@inproceedings{ECOOP-1997-Liquori,
	author        = "Luigi Liquori",
	booktitle     = "{Proceedings of the 11th European Conference on Object-Oriented Programming}",
	doi           = "10.1007/BFb0053378",
	isbn          = "3-540-63089-9",
	pages         = "146--169",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{An Extended Theory of Primitive Objects: FIrst Order System}",
	volume        = 1241,
	year          = 1997,
}