@inproceedings{STOC-1988-HalpernV,
	author        = "Joseph Y. Halpern and Moshe Y. Vardi",
	booktitle     = "{Proceedings of the 20th Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/62212.62218",
	isbn          = "0-89791-264-0",
	pages         = "53--65",
	publisher     = "{ACM}",
	title         = "{Reasoning about Knowledge and Time in Asynchronous Systems}",
	year          = 1988,
}