@inproceedings{STOC-1971-Santos,
	author        = "Eugene S. Santos",
	booktitle     = "{Proceedings of the Third Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/800157.805052",
	pages         = "219--243",
	publisher     = "{ACM}",
	title         = "{Algebraic Structure Theory of Stochastic Machines}",
	year          = 1971,
}