@inproceedings{POPL-1988-Vardi,
	author        = "Moshe Y. Vardi",
	booktitle     = "{Conference Record of the 15th Annual Symposium on Principles of Programming Languages}",
	doi           = "10.1145/73560.73582",
	editor        = "Jeanne Ferrante and P. Mager",
	isbn          = "0-89791-252-7",
	pages         = "250--259",
	publisher     = "{ACM Press}",
	title         = "{A Temporal Fixpoint Calculus}",
	year          = 1988,
}