@inproceedings{ISLP-1991-Plumer,
	author        = "Lutz Plümer",
	booktitle     = "{Proceedings of the Eighth International Symposium on Logic Programming}",
	isbn          = "0-262-69147-7",
	pages         = "503--517",
	publisher     = "{MIT Press}",
	title         = "{Automatic Termination Proofs for Prolog Programs Operating on Nonground Terms}",
	year          = 1991,
}