@inproceedings{ALP-1996-Marchiori,
	author        = "Massimo Marchiori",
	booktitle     = "{Proceedings of the Fifth International Conference on Algebraic and Logic Programming}",
	doi           = "10.1007/3-540-61735-3_7",
	isbn          = "3-540-61735-3",
	pages         = "107--121",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Unravelings and Ultra-properties}",
	volume        = 1139,
	year          = 1996,
}