Y. Chen, G. Dong, J. Han, B. Wah, und J. Wang. Proceedings of the 28th international conference on Very Large Data Bases, Seite 323--334. VLDB Endowment, (2002)
D. McDowall, R. McCleary, E. Meidinger, und R. Jr.. Sage university papers; Series: Quantitative applications in the social sciences; 21 Sage Publications, Inc., (1983)
H. Iba, T. Sato, und H. de Garis. 1995 IEEE Conference on Evolutionary Computation, 1, Seite 97--102. Perth, Australia, IEEE Press, (29 November - 1 December 1995)