@inproceedings{STOC-1983-Kozen,
	author        = "Dexter Kozen",
	booktitle     = "{Proceedings of the 15th Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/800061.808758",
	pages         = "291--297",
	publisher     = "{ACM}",
	title         = "{A Probabilistic PDL}",
	year          = 1983,
}