TY - JOUR AU - Nuno Lopes AU - Cláudio Fernandes AU - Salvador Abreu TI - Representing and Querying Multiple Ontologies with Contextual Logic Programming JO - Computer Science and Information Systems PY - 2008 VL - 5 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CSIS_2008_5_2_a4/ ID - CSIS_2008_5_2_a4 ER -