inproceedings{psi03,
        title = {{A Relational Algebra for Functional Logic Deductive Databases}},
        author = {J. M. {Almendros-Jim\'enez} and A. {Becerra-Ter\'on}},
        year = {2003},
        booktitle = {Proc. of 5th International Conference on Perspectives of System
                     Informatics, PSI03},
        series = {LNCS 2890},
        publisher = {Springer},
        pages = {494--508},
}