@inproceedings{STOC-1978-Schaefer,
	author        = "Thomas J. Schaefer",
	booktitle     = "{Proceedings of the 10th Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/800133.804350",
	pages         = "216--226",
	publisher     = "{ACM}",
	title         = "{The Complexity of Satisfiability Problems}",
	year          = 1978,
}