Publications
Papers published in journals:
116. M. Serva, Particles with constant speed and random velocity in 3+1 space-time:
separation of the space variables.
Journal of Physics A: Mathematical and Theoretical 57, (2024), 295005 (16 pages).
115. M. Serva, Constant speed random particles spontaneously confined on the surface
of an expanding sphere. Journal of Statistical Mechanics: Theory and Experiment, (2024), 053401, (15 pages).
114. M. Pasquini, M. Serva and D. Vergni, Gradual modifications and
abrupt replacements: two stochastic lexical ingredients of language evolution.
Computational linguistics 49(2), (2023), 301-323.
113. M. Serva and M. Pasquini, Linguistic clues suggest that
the Indonesian colonizers directly sailed to Madagascar.
Language Sciences 93, (2022), 101497, (11 pages).
112. M. Serva and M. Pasquini, The Sabaki languages of Comoros.
Indian Ocean Review of Science and Technology, (2021), 1, (5 pages).
111. M. Serva and M. Pasquini, Malagasy dialects in Mayotte.
EPL 133, (2021), 68003, (7 pages).
110. M. Pasquini and M. Serva,
Stability of meanings versus rate of replacement of words: an experimental test.
Journal of Quantitative Linguistics 28, (2021), 95-116.
109. M. Serva, Brownian motion at the speed of light: a new Lorentz invariant family of processes.
Journal of Statistical Physics 182, (2021), 59, (13 pages).
108. M. Serva and M. Pasquini,
Dialects of Madagascar. PLoS ONE 5(10), (2020), e0240170, (28 pages).
107. M. Serva, Random Motion of Light-Speed Particles.
Journal of Statistical Physics 181, (2020), 1603-1608.
106. M. Pasquini and M. Serva,
Horizontal transfers are a primary aspect of languages evolution.
Europhysics Letters 125, (2019), 38002, (9 pages).
105. M. Serva, D. Vergni and A. Vulpiani,
Diffusione e reazione: dal moto Browniano alla diffusione delle epidemie.
Rivista dell'Unione Matematica Italiana. Matematica, Cultura e Società 3,
(2018), 93-102.
104. M. Serva, D. Vergni, D. Volchenkov and A. Vulpiani,
Recovering geography from a matrix of genetic distances.
Europhysics Letters 118, (2017), 48003, (7 pages).
103. M. Serva, D. Vergni and A. Vulpiani,
Linear and anomalous front propagation in systems with non-Gaussian
diffusion: The importance of tails. Physical Review E 94, (2016), 012141, (6 pages).
102. F. Petroni and M. Serva, Observability of market daily volatility.
Physica A 444, (2016), 838-842.
101. M.Serva, A stochastic model for the interbreeding of two populations
sharing the same habitat. Bulletin of Mathematical Biology 77, (2015), 2354-2365.
100. M. L. de Almeida, E. L. Albuquerque, U. L. Fulco and M. Serva,
A percolation system with extremely long range connections and node dilution. Physica A 416, (2014), 273-278.
99. M. Serva, Asymptotic properties of a bold random walk.
Physical Review E 90, (2014), 022121, (4 pages).
98. M. Serva, Exactly solvable tight-binding
model on the RAN: fractal energy spectrum and Bose-Einstein condensation.
Journal of Statistical Mechanics: Theory and Experiment (2014), P08018, (19 pages).
97. I.M.N de Oliveira, F.A.B.F de Moura, M. L. Lyra and M. Serva, Bose-Einstein condensation in diamond
Hierarchical lattices, Physical Review E 89, (2014), 052133, (7 pages).
96. J. F. Fontanari and M. Serva, Effect of migration in a diffusion model for template coexistence in protocells.
Bulletin of Mathematical Biology 76, (2014), 654-672.
95. M. B. da Silva, P. C. Da Silva, A. Macedo-Filho, M. L. Lyra, E. L. Albuquerque, M. Serva and U. L. Fulco,
Non-universality of the absorbing-state phase-transition in a linear chain with power-law diluted long-range
connections. Physica A 404, (2014), 271-278.
94. J. F. Fontanari and M. Serva, Nonlinear group survival in Kimura's model for the evolution of altruism.
Mathematical Biosciences 249, (2014), 18-26.
93. M. Serva, U. L. Fulco and E. L. Albuquerque, Exact solutions and infinite-order phase transitions for a general
class of Ising models on the regularized Apollonian network. Journal of Statistical Mechanics: Theory and
Experiment, (2014), P01010, (23 pages).
92. M. Serva, Scaling behavior for random walks with memory of the largest distance from the origin. Phys. Rev.
E 88, (2013), 052141, (6 pages).
91. M. Serva, U. L. Fulco and E. L. Albuquerque, Ising models on the regularized Apollonian network. Physical
Review E 88, (2013), 042823 (5 pages).
90. M. Serva, F. Petroni, D. Volchenkov and S. Wichmann, From Indonesia to Madagascar: in search of the origins
of the Malagasy language. Indian Ocean Review of Science and Technology (2013), 1, (13 pages).
89. I. N. de Oliveira, T. B. dos Santos, F. A. B. F. de Moura, M. L. Lyra and M. Serva, Critical behavior of the
ideal-gas Bose-Einstein condensation in the Apollonian network. Physical Review E 88, (2013), 022139, (7 pages).
88. J. F. Fontanari and M. Serva, Solvable model for template coexistence in protocells. Europhysics Letters 101,
(2013), 38006, (6 pages).
87. L. F. da Silva, R. N. Costa Filho, A. R. Cunha, A. Macedo-Filho, M. Serva, U. L. Fulco and E. L. Albuquerque,
Critical properties of the SIS model dynamics on the Apollonian network. Journal of Statistical Mechanics:
Theory and Experiment, (2013), P05003, (12 pages).
86. M. B. da Silva, A. Macedo-Filho, E. L. Albuquerque, M. Serva, M. L. Lyra and U. L. Fulco, Critical Properties
of a Super-diffusive Epidemic Process. Physical Review E 87, (2013), 062108, (6 pages).
85. M. Serva, F. Petroni, D. Volchenkov and S. Wichmann, Malagasy dialects and the peopling of Madagascar.
Journal of the Royal Society Interface 9, (2012), 54-67.
84. M. Serva, The settlement of Madagascar: what
dialects and languages can tell us. PLoS ONE 7(2), (2012),
e30666, (8 pages).
83. A. G. M. Neves and M. Serva, Extremely rare interbreeding
events can explain Neandertal DNA in living humans.
PLoS ONE 7(10), (2012), e47076, (10 pages).
82. F. Petroni and M. Serva, Automated world stability and language phylogeny. Journal of Quantitative Linguistics
18, (2011), 53-62.
81. Ph. Blanchard, F. Petroni, M. Serva and D. Volchenkov, Geometric representations of language taxonomies.
Computer Speech and Language 25, (2011), 679-699.
80. M. Serva, Exact and approximate solutions for the dilute Ising model. Physica A 390, (2011), 2443-2451.
79. F. Petroni and M. Serva, Measures of lexical distance between languages. Physica A 389, (2010), 2280-2283.
78. F. Petroni and M. Serva, Lexical evolution rates derived from automated stabililty measures. Journal of Statistical
Mechanics: Theory and Experiment, (2010), P03015, (10 pages).
77. M. Serva, Magnetization densities as replica parameters: the dilute ferromagnet. Physica A 389, (2010), 2700-2707.
76. L. Prignano and M. Serva, Genealogical trees from genetic distances. European Physical Journal B 69, (2009),
455-463.
75. F. Petroni, L. Prignano and M. Serva, Family trees: languages and genetics. Markov Processes and Related Fields 15, (2009),
417-440.
74. M. Serva and F. Petroni, Indo-European languages tree by Levenshtein distance. Europhysics Letters 81, (2008),
68005 (5 pages).
73. C. M. Nascimento, H. B. N. Junior, H. D. Jennings, M. Serva, Iram Gleria and G. M. Viswanathan,
Multifractality and heteroscedastic dynamics: An application to time series analysis. Europhysics Letters 81, (2008),
18002 (4 pages).
72. F. Petroni and M. Serva, Language distance and tree reconstruction. Journal of Statistical Mechanics: Theory
and Experiment, (2008), P08012, (15 pages).
71. A. Figueiredo, R. Matsushita, S. daSilva, M. Serva, G. M. Viswanathan, C. Nascimento and I. M. Gleria, The
Levy sections theorem: An application to econophysics. Physica A 386, (2007), 756-759.
70. H.B. Nascimento Jr., U.L. Fulco, M L. Lyra, M. Serva and G.M. Viswanathan, Porque as bolsas de valores
quebram: a origem das caudas grossas nas distribuicoes de retornos - Why stock markets crash: the origin of
fat tailed distributions of returns. Revista Brasileira de Ensino da Fisica 29, (2007), 341-346.
69. M. Serva, Mitochondrial DNA replacement versus nuclear DNA persistence. Journal of Statistical Mechanics:
Theory and Experiment, (2006), P10013, (8 pages).
68. M. Serva, U. L. Fulco, I. M. Gleria, M. L. Lyra, F. Petroni and G. M. Viswanathan, A Markov model of financial
returns. Physica A 363, (2006), 393-403.
67. F. Petroni and M. Serva, Investment strategies and hidden variables. European Physical Journal B 51, (2006),
601-608.
66. M. Serva, On the genealogy of populations: trees, branches and offspring. Journal of Statistical Mechanics:
Theory and Experiment, (2005), P07011, (19 pages).
65. L. Berardi and M. Serva, Time and foreign exchange markets. Physica A 353, (2005), 403-412.
64. M. Serva, Lack of self averaging in family trees. Physica A 332, (2004), 387-393.
63. F. Petroni and M. Serva, Real prices from spot foreign exchange market. Physica A 344, (2004), 194-197.
62. U. L. Fulco, M. L. Lyra, F. Petroni, M. Serva and G. M. Viswanathan, A stochastic model for multifractal
behavior of stock prices. International Journal of Modern Physics B 18, (2004), 681-689.
61. F. Petroni and M. Serva, Spot foreign exchange market and time series. European Physical Journal B 34,
(2003), 495-500.
60. G. M. Viswanathan, U. L. Fulco, M. L. Lyra and M. Serva, The origin of fat-tailed distributions in financial
time series. Physica A 329, (2003), 273-280.
59. R. Baviera, M. Pasquini, J. Raboanary and M. Serva, Moving averages and price dynamics. International
Journal of Theoretical and Applied Finance 5, (2002), 575-583.
58. R. Baviera, M. Pasquini, M. Serva, D. Vergni and A. Vulpiani, Antipersistent Markov behaviour in foreign
exchange markets. Physica A 312, (2002), 565-576.
57. R. Baviera, M. Pasquini, M. Serva, D. Vergni and A. Vulpiani, Correlations and multi-affinity in high frequency
financial datasets. Physica A 300, (2001), 551-557.
56. R. Baviera, M. Pasquini, M. Serva, D. Vergni and A. Vulpiani, Forecast in foreign exchange markets. European
Physical Journal B 20, (2001) 473-479.
55. M. Serva, Random dynamical systems, entropies and information. Physica A 290, (2001), 243-250.
54. M. Pasquini and M. Serva, Macroscopically frustrated Ising model. Physical Review E 63, (2001), 56109-56114.
53. E. Aurell, R. Baviera, O. Hammarlid, M. Serva and A. Vulpiani, A general methodology to price and hedge
derivatives in incomplete markets. International Journal of Theoretical and Applied Finance 3 , (2000), 1-24.
52. M. Pasquini and M. Serva, Indeterminacy in foreign exchange markets. Physica A 277, (2000), 228-238.
51. E. Aurell, R. Baviera, O. Hammarlid, M. Serva and A. Vulpiani, Growth optimal investment and pricing of
derivatives. Physica A 280, (2000), 505-521.
50. M. Pasquini and M. Serva, Clustering of volatility as a multiscale phenomenon. European Physical Journal B
16, (2000), 195-201.
49. Ph. Blanchard, M. Pasquini and M. Serva, Effective localization induced by noise and non linearity. Physica D
141, (2000), 214-220.
48. M. Pasquini and M. Serva, Multiscale behaviour of volatility autocorrelations in a financial market. Economics
Letters, 65, (1999), 275-279.
47. M. Serva, Optimal lag in dynamical investments. International Journal of Theoretical and Applied Finance 2,
(1999), 471-481.
46. M. Pasquini and M. Serva, Multiscaling and clustering of volatility. Physica A 269, (1999), 140-147.
45. R. Baviera, M. Pasquini and M. Serva, Cluster approximation for Ising spin glasses. Journal de Physique IV 8,
(1998), 75-79.
44. V. Loreto, M. Serva and A. Vulpiani, On the concept of complexity of random dynamical systems. International
Journal of Modern Physics B 12, (1998), 225-243.
43. R. Baviera, M. Pasquini and M. Serva, A variational approach to Ising spin glasses in finite dimensions. Journal
of Physics A: Mathematical and General 31, (1998), 4127-4140.
42. M. Serva, 2d Ising model with layers of quenched spins. Journal of Statistical Physics 91, (1998), 31-45.
41. R. Baviera, M. Pasquini, M. Serva and A. Vulpiani, Optimal strategies for prudent investors. International
Journal of Theoretical and Applied Finance 1, (1998), 473-486.
40. M. Pasquini and M. Serva, Two-dimensional frustrated Ising model with four phases. Physical Review E 56,
(1997), 2751-2756.
39. M. Serva, Exact solution of a two-dimensional random Ising model. Physical Review E 56, (1997), R2339-R2342.
38. R. Donato, L. Peliti and M. Serva, The selection of altruistic behavior. Theory in Biosciences/Theorie in den
Biowissenschaften 116, (1997), 309-320.
37. M. Serva, G. Paladin and J. Raboanary, Mean field solution of the random Ising model on the dual lattice.
Physical Review E 52, (1996) R9-R12.
36. G. Paladin and M. Serva, Bethe-Peierls approximation for the 2d random Ising model. Journal of Physics A:
Mathematical and General 29, (1996) 1381-1395.
35. G. Paladin and M. Serva, Beyond the mean field approximation for the spin glasses. Physical Review E 54,
(1996) 4637-4643.
34. Ph. Blanchard and M. Serva, Reply to "Comment on "Repeated measurements in stochastic mechanics"".
Physical Review D 51, (1995) 3132-3134.
33. G. Paladin, M. Pasquini and M. Serva, Constrained annealing for spin glasses. Journal de Physique I 5, (1995)
337-354.
32. M. Pasquini, G. Paladin and M. Serva, Sequence of constrained annealed averages for one-dimensional disordered
systems. Physical Review E 51, (1995) 2006-2012.
31. M. Pasquini, G. Paladin and M. Serva, Rigorous bounds of the Lyapunov exponents of the one dimensional
random Ising model. Journal of Statistical Physics 80, (1995) 357-373.
30. S. Scarlatti, M. Serva and M. Pasquini, Large deviations for Ising spin glasses with constrained disorder. Journal
of Statistical Physics 80, (1995) 337-356.
29. G. Paladin, M. Serva and A. Vulpiani, Complexity in dynamical systems with noise. Physical Review Letters
74, (1995) 66-69.
28. L. Chiatti, M. Cini and M. Serva, Is macroscopic quantum coherence incompatible with macroscopic realism? Il
Nuovo Cimento B 110, (1995), 585-592.
27. G. Paladin, M. Pasquini and M. Serva, Constrained annealing for systems with quenched disorder. International
Journal of Modern Physics B 9, (1995) 399-467.
26. A. Crisanti, G. Paladin, M. Serva and A. Vulpiani, Products of random matrices for disordered systems. Physical
Review E 49, (1994) R953-R956.
25. Ph. Blanchard, G. Bolz, M. Cini, G.F. De Angelis and M. Serva, Localization stabilized by noise. Journal of
Statistical Physics 75, (1994) 749-755.
24. A. Crisanti, M. Falcioni, G. Paladin, M. Serva and A. Vulpiani, Complexity in quantum systems. Physical
Review E 50, (1994) 138-144.
23. G. Paladin, M. Pasquini and M. Serva, Ferrimagnetism in a disordered Ising model. Journal de Physique I 4,
(1994) 1597-1617.
22. M. Serva and G. Paladin, Gibbs thermodynamic potentials for disordered systems. Physical Review Letters 70,
(1993) 105-108.
21. A. Crisanti, G. Paladin, M. Serva and A. Vulpiani, Random transfer matrices for the overlap in disordered
systems. Physical Review Letters 71, (1993) 789-792.
20. A. Crisanti, G. Paladin, M. Serva and A. Vulpiani, Lack of self-averaging in weakly disordered one dimensional
systems. Journal de Physique I 3, (1993) 1993-2006.
19. G. F. De Angelis and M. Serva, Imaginary-time path integrals from Klein-Gordon equation. Europhysics Letters
18, (1992) 477-482.
18. G. F. De Angelis and M. Serva, Brownian path integrals from Dirac equation: a probabilistic approach to the
Foldy-Wouthuysen transformation. Journal of Physics A: Mathematical and General 25, (1992) 6539-6550.
17. M. Cini and M. Serva, Phase space representation of quantum mechanics in terms of coherent states. Il Nuovo
Cimento B 107, (1992) 825-833.
16. G. Paladin and M. Serva, Analytic solution of the random Ising model in one dimension. Physical Review
Letters 69, (1992) 706-709.
15. M. Cini and M. Serva, Measurement in quantum mechanics and classical statistical mechanics. Physics Letters
A 167, (1992) 319-325.
14. G. F. De Angelis, A. Rinaldi and M. Serva, Imaginary-time path integral for a relativistic spin 1/2 particle in a
magnetic field. Europhysics Letters 14, (1991) 95-100.
13. M. Serva and L. Peliti, A statistical model of an evolving population with sexual reproduction. Journal of Physics
A: Mathematical and General 24, (1991) L705-L709.
12. M. Serva, Hamiltonian semigroups associated to boson's systems: a probabilistic approach. Journal of Physics
A: Mathematical and General 23, (1990) 863-870.
11. R. Marra and M. Serva, Variational principles for a relativistic stochastic mechanics. Annales de l'Institut Henri
Poincare, Phisique theorique 53, (1990) 97-108.
10. M. Cini and M. Serva, Where is an object before we look at it? Foundation of Physics Letters 3, (1990) 129-151.
9. G. F. De Angelis and M. Serva, Jump processes and diffusions in relativistic stochastic mechanics. Annales de
l'Institut Henri Poincare, Phisique theorique 53, (1990) 301-317.
8. G. F. De Angelis and M. Serva, On the relativistic Feynman-Kac-Ito formula.
Journal of Physics A: Mathematical and General 23, (1990) L965-L968.
7. Y.-C. Zhang, M. Serva and M. Policarpov, Diffusion reproduction processes. Journal of Statistical Physics 58,
(1990) 849-861.
6. M. Serva, Relativistic stochastic processes associated to Klein-Gordon equation. Annales de l'Institut Henri
Poincare, Phisique theorique 49, (1988) 415-432.
5. M. Serva, Probabilistic solutions of generalized birth and death equations and applications to field theory. Journal
of Physics A: Mathematical and General 20, (1987) 435-446.
4. M. Cini and M. Serva, Stochastic theory of emission and absorption of quanta. Journal of Physics A: Mathematical and General 19, (1986) 1163-1177.
3. G. F. De Angelis, G. Jona-Lasinio, M. Serva and N. Zanghi, Stochastic mechanics of a Dirac particle in two
space-time dimensions. Journal of Physics A: Mathematical and General 19, (1986) 865-871.
2. Ph. Blanchard, S. Golin and M. Serva,
Repeated measurements in stochastic mechanics.
Physical Review D 34, (1986) 3732-3738.
1. M. Serva, Elastic scattering in stochastic mechanics.
Lettere al Nuovo Cimento 41, (1984) 198-202.
Popularization and papers in volume:
6. M. Serva, Le origini del popolo malgascio,
alcune certezze e qualche mistero. In Maddmaths! Matematica
Divulgazione Didattica, (2017),
http://maddmaths.simai.eu/divulgazione/focus/popolo-malgascio/
5. F. Petroni, M. Serva and D. Volchenkov, Levenstein's distance for measuring lexical evolution rates. In Nonlinear
Dynamics, New Directions: Models and Applications, Series: Nonlinear Systems and Complexity, edited by H.Gonzalez-Aguilar and E. Ugalde, (Springer, New York, 2015), Vol. 12, 215-240.
4. E. Aurell, R. Baviera, O. Hammarlid, M. Serva and A. Vulpiani, Large bets, rare fluctuations and derivative
pricing. In Off the wall, monthly columnn of Numerix, (1998), Numerix LLC, www.numerix.com, (5 pages).
3. M. Serva, Traiettorie stocastiche. In Enciclopedia delle Scienze Fisiche, Istituto della Enciclopedia Italiana, G.
Treccani. Vol. VI (1995) 265-271.
2. G. F. De Angelis and M. Serva,
Path integrals in relativistic quantum mechanics.
In Quantum Probability and related topics, edited by L. Accardi,
QP-PQ: Quantum Probability and White Noise Analysis 9, (1994) 159-188.
1. Ph. Blanchard, M. Cini and M. Serva,
The measurement problem in the stochastic formulation of quantum mechanics.
In Ideas and methods in quantum and statistical physics.
In memory of Raphael Hoegh-Krohn, edited by S. Albeverio et al.
(Cambridge University Press, 1992), 2, 149-171.
Conference procedings:
12. M. Serva, The origins of the Malagasy people, some certainties
and a few mysteries - As origens do povo malgaxe, algumas certezas e varios misterios.
IEAT Grande Conferencia, Instituto de Estudos Avancados Transdisciplinares,
https://www.ufmg.br/ieat/, (Belo Horizonte, 2017), (13 pages).
11. F. Petroni, M. Serva and D. Volchenkov, Unraveling the tangles of language evolution. In Chaos, Complexity
and Transport, (Marseille 2011) edited by X. Leoncini and M. Leonetti, (World Scientific, 2012), 230-260.
10. M. Serva, Ph. Blanchard, E. W. Holman, F. Petroni, D. Volchenkov and S. Wichmann, The phylogeny of
Malagasy dialects. In Cognitive modeling in linguistics, (Dubrovnik 2010). Text Processing and Cognitive
Technologies 19, edited by V. Solovyev and V. Polyakov, (Kazan: KSU, 2010), 253-256.
9. M. Serva, Automated languages phylogeny from Levenshtein
distance - Filogenia automatizada de linguas a partir da distancia de Levenshtein.
International Conference, Visitas Internationais, Instituto de Estudos Avancados Transdisciplinares,
https://www.ufmg.br/ieat/, (Belo Horizonte, 2009), (10 pages).
8. Ph. Blanchard, M. Pasquini and M. Serva, Classical limit: localization induced by noise. In The foundations
of quantum mechanics. Historical analysis and open questions, (Lecce 1998) edited by C. Garola and A. Rossi
(World Scientific, Singapore, 2000), 63-72.
7. R. Baviera, M. Pasquini, M. Serva, D. Vergni and A. Vulpiani, Weak effciency and information in foreign
exchange markets. In Finance and Turbulence, (Aarhus 1999). Edited by O. E. Barndorff-Nielsen, B. J. Chris-
tensen, H. Bunzel and M. Srensen. ISSN 1398-5981, MaPhySto Series: MPS-misc 1999-14, (1999), 5-25.
6. L. Chiatti, M. Cini and M. Serva, Macroscopic quantum coherence as a test of quantum mechanics. In The
foundations of quantum mechanics. Historical analysis and open questions, (Lecce 1993) edited by C. Garola
and A. Rossi (Kluwer Academic Publishers, The Netherlands, 1995), 147-153.
5. G. F. De Angelis and M. Serva, Relativistic quantum mechanics and path integral for Klein-Gordon equation.
In The foundations of quantum mechanics. Historical analysis and open questions, (Lecce 1993) edited by C.
Garola and A. Rossi (Kluwer Academic Publishers, The Netherlands, 1995), 187-200.
4. M. Serva, Processi di Bernstein e meccanica quantistica. In I fondamenti della meccanica quantistica. Analisi
storica e problemi aperti, (Camerino 1988) edited by G. Cattaneo and A. Rossi (EditEl, Commenda di Rende,
1991), 317-324.
3. G. Bolz and M. Serva, Path integral over Poisson trajectories: analytical and numerical estimates of ground
state energies. In Stochastic processes: physics and geometry, (Ascona/Locarno 1988) edited by S. Albeverio et
al. (World Scientific, Singapore, 1990), 197-206.
2. M. Cini and M. Serva,
State vector collapse as a classical statistical effect of measurement.
In Quantum theory without reduction, (Roma 1989)
edited by M. Cini and J.-M. Levy-Leblond
(A. Hilger, IOP Publishing Ldt. London, 1990), 103-121.
1. M. Cini and M. Serva,
Stochastic interpretation of emission and absorption of the quantum of action.
In NATO Advanced Research Workshop on Fundamental aspects of quantum theory,
(Como 1985) edited by V. Gorini and A. Frigerio
(Plenum Publishing Corporation, NY, 1986), 133-137.
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