@inproceedings{OOPSLA-1989-FentonB,
	author        = "Jay Fenton and Kent Beck",
	booktitle     = "{Proceedings of the Fourth Conference on Object-Oriented Programming, Systems, Languages and Applications}",
	doi           = "10.1145/74877.74891",
	editor        = "George Bosworth",
	isbn          = "0-89791-333-7",
	pages         = "123--137",
	publisher     = "{ACM}",
	title         = "{Playground: An Object-Oriented Simulation System With Agent Rules for Children of All Ages}",
	year          = 1989,
}