Kevin S. Beyer, Peter J. Haas, Berthold Reinwald, Yannis Sismanis, Rainer Gemulla. On synopses for distinct-value estimation under multiset operations. In Chee Yong Chan, Beng Chin Ooi, Aoying Zhou, editors, Proceedings of the ACM SIGMOD International Conference on Management of Data, Beijing, China, June 12-14, 2007. pages 199-210, ACM, 2007. [doi]
Abstract is missing.