@inproceedings{PADL-2009-PereiraP,
	author        = "Luís Moniz Pereira and Alexandre Miguel Pinto",
	booktitle     = "{Proceedings of the 11th International Symposium on Practical Aspects of Declarative Languages}",
	doi           = "10.1007/978-3-540-92995-6_18",
	isbn          = "978-3-540-92994-9",
	pages         = "254--268",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Layered Models Top-Down Querying of Normal Logic Programs}",
	volume        = 5418,
	year          = 2009,
}