@inproceedings{PLILP-1993-NataliO,
	author        = "Antonio Natali and Andrea Omicini",
	booktitle     = "{Proceedings of the Fifth International Symposium on Programming Language Implementation and Logic Programming}",
	doi           = "10.1007/3-540-57186-8_81",
	isbn          = "3-540-57186-8",
	pages         = "220--234",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Objects with State in Contextual Logic Programming}",
	volume        = 714,
	year          = 1993,
}