inproceedings{prole02,
        title = {{A Safe Calculus and Algebra for Querying Functional
                 Logic Deductive Databases}},
        author = {J. M. {Almendros-Jim\'enez} and A. {Becerra-Ter\'on}},
        year = {2002},
        booktitle = {Proc. of II Jornadas sobre Programación y Lenguajes, 
                 PROLE02},
        publisher = {Universidad Polit\'ecnica de Madrid},
        pages = {71--86},
}