@inproceedings{SLP-1987-HuberV87,
	author        = "Martin Huber and Igor Varsek",
	booktitle     = "{Proceedings of the Fourth Symposium on Logic Programming}",
	isbn          = "0-8186-0799-8",
	pages         = "34--43",
	publisher     = "{IEEE-CS}",
	title         = "{Extended Prolog for Order-Sorted Resolution}",
	year          = 1987,
}