@inproceedings{SLP-1987-Blair87,
	author        = "Howard A. Blair",
	booktitle     = "{Proceedings of the Fourth Symposium on Logic Programming}",
	isbn          = "0-8186-0799-8",
	pages         = "154--161",
	publisher     = "{IEEE-CS}",
	title         = "{Canoncical Conservative Extensions of Logic Program Completions}",
	year          = 1987,
}