@inproceedings{NACLP-1989-JacobsL,
	author        = "Dean Jacobs and Anno Langen",
	booktitle     = "{Proceedings of the North American Conference on Logic Programming, 2 Volumes}",
	isbn          = "0-262-62064-2",
	pages         = "154--165",
	publisher     = "{MIT Press}",
	title         = "{Accurate and Efficient Approximation of Variable Aliasing in Logic Programs}",
	year          = 1989,
}