@inproceedings{SCC-1979-Williams,
	author        = "Graeme Williams",
	booktitle     = "{Proceedings of the 1979 SIGPLAN Symposium on Compiler Construction}",
	doi           = "10.1145/800229.806950",
	isbn          = "0-89791-002-8",
	pages         = "13--25",
	publisher     = "{ACM}",
	title         = "{Program checking}",
	year          = 1979,
}