@inproceedings{STOC-1981-Streett,
	author        = "Robert S. Streett",
	booktitle     = "{Proceedings of the 13th Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/800076.802492",
	pages         = "375--383",
	publisher     = "{ACM}",
	title         = "{Propositional Dynamic Logic of Looping and Converse}",
	year          = 1981,
}