@inproceedings{ECOOP-1998-Liquori,
	author        = "Luigi Liquori",
	booktitle     = "{Proceedings of the 12th European Conference on Object-Oriented Programming}",
	doi           = "10.1007/BFb0054105",
	editor        = "Eric Jul",
	isbn          = "3-540-64737-6",
	pages         = "498--522",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{On Object Extension}",
	volume        = 1445,
	year          = 1998,
}