@inproceedings{SAC-1997-CoppaNT,
	author        = "Francesca Coppa and Enrico Nardelli and Maurizio Talamo",
	booktitle     = "{Proceedings of the 12th Symposium on Applied Computing}",
	doi           = "10.1145/331697.331728",
	pages         = "144--151",
	publisher     = "{ACM}",
	title         = "{A formal model for the discrete representation of spatial objects}",
	year          = 1997,
}