Klemens Böhm Christian S. Jensen Laura M. Haas Martin L. Kersten Per-Åke Larson Beng Chin Ooi Proceedings of the 31st International Conference on Very Large Data Bases, Trondheim, Norway, August 30 - September 2, 2005 2005 1-59593-154-6 1-59593-177-5 ACM db/conf/vldb/vldb2005.html