@inproceedings{SAS-2002-BagnaraRZH,
	author        = "Roberto Bagnara and Elisa Ricci and Enea Zaffanella and Patricia M. Hill",
	booktitle     = "{Proceedings of the Ninth International Static Analysis Symposium}",
	doi           = "10.1007/3-540-45789-5_17",
	isbn          = "3-540-44235-9",
	pages         = "213--229",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Possibly Not Closed Convex Polyhedra and the Parma Polyhedra Library}",
	volume        = 2477,
	year          = 2002,
}