@inproceedings{JICSCP-1988-ParkerM88,
	author        = "Douglas Stott Parker Jr. and Richard R. Muntz",
	booktitle     = "{Proceedings of the Joint International Fifth Conference and Symposium on Logic Programming, 2 Volumes}",
	isbn          = "0-262-61056-6",
	pages         = "620--650",
	publisher     = "{MIT Press}",
	title         = "{A Theory of Directed Logic Programs and Streams}",
	year          = 1988,
}