@Article{RodrĂ­guezBrisaboa02,
author = {Brisaboa, N. R. and Penabad, M. R. and Places, A. S. and RodrĂ­guez, F. J.},
title = {Ontologies for Database Federation},
journal = {Upgrade, The European Magazine for the IT Profesional},
year = {2002},
pages = {52-61}
}