@inproceedings{PPDP-2004-ClevaLL,
	author        = "José Miguel Cleva and Javier Leach and Francisco Javier López-Fraguas",
	booktitle     = "{Proceedings of the Sixth International Conference on Principles and Practice of Declarative Programming}",
	doi           = "10.1145/1013963.1013969",
	isbn          = "1-58113-819-9",
	pages         = "9--19",
	publisher     = "{ACM}",
	title         = "{A logic programming approach to the verification of functional-logic programs}",
	year          = 2004,
}