W. Yu, S. Liang, and D. Panda. Proceedings of the 19th annual international conference on Supercomputing, page 323--331. New York, NY, USA, ACM, (2005)
R. Fang, B. He, M. Lu, K. Yang, N. Govindaraju, Q. Luo, and P. Sander. SIGMOD '07: Proceedings of the 2007 ACM SIGMOD international conference on Management of data, page 1061--1063. New York, NY, USA, ACM, (2007)