Aline Lúcia Baroni Coral Calero Fernando Brito e Abreu Mario Piattini Object-Relational Database Metrics Formalization. 30-37 2006 conf/qsic/2006 QSIC http://doi.ieeecomputersociety.org/10.1109/QSIC.2006.44 db/conf/qsic/qsic2006.html#BaroniCAP06