@inproceedings{POPL-1979-GoodC,
	author        = "Donald I. Good and Richard M. Cohen and James Keeton-Williams",
	booktitle     = "{Conference Record of the Sixth Annual Symposium on Principles of Programming Languages}",
	cdrom         = "POPL/00001696.PDF",
	doi           = "10.1145/567752.567757",
	editor        = "Alfred V. Aho and Stephen N. Zilles and Barry K. Rosen",
	pages         = "42--52",
	publisher     = "{ACM Press}",
	title         = "{Principles of Proving Programs Correct in Gypsy}",
	year          = 1979,
}