@ARTICLE{CSSE19, 
	author = {Giuseppe Della Penna and  Sergio Orefice},
	title = {Using spatial relations for qualitative specification of gestures}, 
	doi = {10.32604/csse.2019.34.325},
	journal = {Computer Systems Science and Engineering},
	editor = {CRL Publishing},

	pages = {325--338},
	year = {2019},
	month = {11},
	volume = {34},
	number = {6}
	
}