@Inproceedings{ParamáGabía02,
author = {Paramá, J. R. and Brisaboa, N. R. and Penabad, M. R.},
title = {Containment of inequality queries revisited},
booktitle = {Proceedings of the 6th East European Conference on Advances in Databases and Information Systems (ADBIS 2002), Volume 2: Research Communications.},
address = {Bratislava},
year = {2002},
pages = {31-40}
}