Y. Cai, X. Dong, A. Halevy, J. Liu, и J. Madhavan. Proceedings of the 2005 ACM SIGMOD conference on Management of data, стр. 921--923. New York, NY, USA, ACM Press, (2005)
X. Dong, A. Halevy, и J. Madhavan. SIGMOD '05: Proceedings of the 2005 ACM SIGMOD international conference on Management of data, стр. 85--96. New York, NY, USA, ACM Press, (2005)