@inproceedings{ICALP-1976-Cartwright,
	author        = "Robert Cartwright",
	booktitle     = "{Proceedings of the Third International Colloquium on Automata, Languages and Programming}",
	isbn          = "0-85224-308-1",
	pages         = "228--256",
	title         = "{User-Defined Data Types as an Aid to Verifying LISP Programs}",
	year          = 1976,
}