@inproceedings{PADL-2001-BellaB,
	author        = "Giampaolo Bella and Stefano Bistarelli",
	booktitle     = "{Proceedings of the Third International Symposium on Practical Aspects of Declarative Languages}",
	doi           = "10.1007/3-540-45241-9_8",
	isbn          = "3-540-41768-0",
	pages         = "108--122",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Soft Constraints for Security Protocol Analysis: Confidentiality}",
	volume        = 1990,
	year          = 2001,
}