@inproceedings{STOC-1977-Kozen,
	author        = "Dexter Kozen",
	booktitle     = "{Proceedings of the Ninth Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/800105.803406",
	pages         = "164--177",
	publisher     = "{ACM}",
	title         = "{Complexity of Finitely Presented Algebras}",
	year          = 1977,
}