@inproceedings{OOPSLA-1989-LieberherrR,
	author        = "Karl J. Lieberherr and Arthur J. Riel",
	booktitle     = "{Proceedings of the Fourth Conference on Object-Oriented Programming, Systems, Languages and Applications}",
	doi           = "10.1145/74877.74881",
	editor        = "George Bosworth",
	isbn          = "0-89791-333-7",
	pages         = "11--22",
	publisher     = "{ACM}",
	title         = "{Contributions to Teaching Object Oriented Design and Programming}",
	year          = 1989,
}