@inproceedings{TOOLS-PACIFIC-1997-Gil,
	author        = "Joseph Yossi Gil",
	booktitle     = "{Proceedings of the 25th International Conference on Technology of Object-Oriented Languages and Systems}",
	doi           = "10.1109/TOOLS.1997.681894",
	isbn          = "0-8186-8485-2",
	pages         = "368",
	publisher     = "{IEEE Computer Society}",
	title         = "{Extendability vs. Substitutability in OO Languages}",
	year          = 1997,
}