@article{tapos95:fisher+,
	address={New York, NY, USA},
	author={Fisher, Kathleen and Mitchell, John C.},
	journal={Theory and Practice of Object Systems},
	number=3,
	pages={189--220},
	publisher={John Wiley \& Sons, Inc.},
	title={The development of type systems for object-oriented languages},
	volume=1,
	year=1995,
}