@inproceedings{STOC-1990-Yao,
	author        = "Andrew Chi-Chih Yao",
	booktitle     = "{Proceedings of the 22nd Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/100216.100226",
	isbn          = "0-89791-361-2",
	pages         = "84--94",
	publisher     = "{ACM}",
	title         = "{Coherent Functions and Program Checkers}",
	year          = 1990,
}