@inproceedings{STOC-1987-LichtensteinLS,
	author        = "David Lichtenstein and Nathan Linial and Michael E. Saks",
	booktitle     = "{Proceedings of the 19th Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/28395.28414",
	isbn          = "0-89791-221-7",
	pages         = "169--177",
	publisher     = "{ACM}",
	title         = "{Imperfect Random Sources and Discrete Controlled Processes}",
	year          = 1987,
}