Klaus R. Dittrich Giovanna Guerrini Isabella Merlo Marta Oliva Elena Rodríguez Objects and Databases, International Symposium, Sophia Antipolis, France, June 13, 2000, Proceedings Objects and Databases Lecture Notes in Computer Science 1944 Springer 2001 3-540-41664-1 db/conf/oodbs/oodbs2000.html