@inproceedings{NACLP-1989-MelloNR,
	author        = "Paola Mello and Antonio Natali and Cristina Ruggieri",
	booktitle     = "{Proceedings of the North American Conference on Logic Programming, 2 Volumes}",
	isbn          = "0-262-62064-2",
	pages         = "441--458",
	publisher     = "{MIT Press}",
	title         = "{Logic Programming in a Software Engineering Perspective}",
	year          = 1989,
}