M. Mathioudakis, und N. Koudas. Proceedings of the 2010 ACM SIGMOD International Conference on Management of data, Seite 1155--1158. New York, NY, USA, ACM, (2010)
S. Nissanke, D. Holz, S. Hughes, N. Dalal, und J. Sievers. (2009)cite arxiv:0904.1017
Comment: 19 pages, 10 figures. Accepted for publication in ApJ; this version
incorporates referee's comments and criticisms.