@inproceedings{STOC-1976-Schaefer,
	author        = "Thomas J. Schaefer",
	booktitle     = "{Proceedings of the Eighth Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/800113.803629",
	pages         = "41--49",
	publisher     = "{ACM}",
	title         = "{Complexity of Decision Problems Based on Finite Two-Person Perfect-Information Games}",
	year          = 1976,
}