@inproceedings{LFP-1990-HowardM,
	author        = "Brian T. Howard and John C. Mitchell",
	booktitle     = "{Proceedings of the 1990 ACM Conference on LISP and Functional Programming}",
	doi           = "10.1145/91556.91677",
	isbn          = "0-89791-368-X",
	pages         = "298--306",
	publisher     = "{ACM Press}",
	title         = "{Operational and Axiomatic Semantics of PCF}",
	year          = 1990,
}