@inproceedings{OOPSLA-2000-RubyL,
	author        = "Clyde Ruby and Gary T. Leavens",
	booktitle     = "{Proceedings of the 15th Conference on Object-Oriented Programming, Systems, Languages and Applications}",
	doi           = "10.1145/353171.353186",
	editor        = "Mary Beth Rosson and Doug Lea",
	isbn          = "1-58113-200-X",
	pages         = "208--228",
	publisher     = "{ACM}",
	title         = "{Safely creating correct subclasses without seeing superclass code}",
	year          = 2000,
}