@inproceedings{RTA-1991-Klay,
	author        = "Francis Klay",
	booktitle     = "{Proceedings of the Fourth International Conference on Rewriting Techniques and Applications}",
	doi           = "10.1007/3-540-53904-2_92",
	editor        = "Ronald V. Book",
	isbn          = "3-540-53904-2",
	pages         = "136--149",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Undecidable Properties of Syntactic Theories}",
	volume        = 488,
	year          = 1991,
}