@ARTICLE{KAIS2011, 
	author = {Giuseppe Della Penna and  Daniele Magazzeni and  Sergio Orefice},
	title = {A Spatial Relation based Framework to Perform Visual Information Extraction}, 
	doi = {10.1007/s10115-011-0394-4},
	journal = {Knowledge and Information Systems},
	editor = {Springer},

	pages = {667--692},
	year = {2012},
	month = {2},
	volume = {30},
	number = {2}
	
}