@inproceedings{PLILP-1992-AptP,
	author        = "Krzysztof R. Apt and Alessandro Pellegrini",
	booktitle     = "{Proceedings of the Fourth International Symposium on Programming Language Implementation and Logic Programming}",
	doi           = "10.1007/3-540-55844-6_87",
	isbn          = "3-540-55844-6",
	note          = "long version: TOPLAS 16(3): 687-726 (1994)",
	pages         = "69--86",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Why the Occur-Check is Not a Problem}",
	volume        = 631,
	year          = 1992,
}