@inproceedings{TOOLS-PACIFIC-1992-Ratjens92a,
	author        = "Mark Ratjens",
	booktitle     = "{Proceedings of the Sixth International Conference on Technology of Object-Oriented Languages and Systems}",
	isbn          = "0-13-926940-1",
	pages         = "235",
	publisher     = "{Prentice Hall}",
	title         = "{Introduction to Object-Oriented Concepts}",
	year          = 1992,
}