@inproceedings{CRR09,
	Address = {Pasadena, CA, USA},
	Author = {Caballero, Rafael and Rodr\'iguez-Artalejo, Mario and Romero-D\'iaz, Carlos A.},
	Booktitle = {Logic Programming (ICLP'09)},
	Editor = {Hill, P.M. and Warren, D.S.},
	Month = {July 14-17},
	Pages = {449-463},
	Publisher = {Springer-Verlag Berlin Heidelberg},
	Series = {LNCS},
	Title = {Qualified Computations in Functional Logic Progamming},
	Volume = {5649},
	Year = {2009}
}