@Inproceedings{HernándezLópez97,
author = {Hernandez, H. J. and Tang, D. and Brisaboa, N. R.},
title = {Linear Envelopes for Datalog Predicates},
booktitle = {Memoria del 4º Congreso Internacional de Investigación en Ciencias Computacionales (CIICC'97)},
address = {Durango},
year = {1997},
pages = {45-56}
}