@article{ANSS13b, title = "An extended constraint deductive database: Theory and implementation ", journal = "The Journal of Logic and Algebraic Programming ", volume = "", number = "0", pages = " - ", year = "2013", note = "", issn = "1567-8326", doi = "http://dx.doi.org/10.1016/j.jlap.2013.07.002", url = "http://www.sciencedirect.com/science/article/pii/S1567832613000325", author = "G. Aranda-López and S. Nieva and F. Sáenz-Pérez and J. Sánchez-Hernández", keywords = "Deductive databases", keywords = "Constraints", keywords = "Hereditary Harrop formulas", keywords = "Fixpoint semantics " }