@inproceedings{NACLP-1990-Andrews,
	author        = "James H. Andrews",
	booktitle     = "{Proceedings of the North American Conference on Logic Programming, 2 Volumes}",
	isbn          = "0-262-54058-4",
	pages         = "585--602",
	publisher     = "{MIT Press}",
	title         = "{The Logical Structure of Sequential Prolog}",
	year          = 1990,
}