J. Kim, and B. Zhang. Proceedings of the Congress on Evolutionary
Computation, 1, page 252--258. Mayflower Hotel, Washington D.C., USA, IEEE Press, (6-9 July 1999)
D. Cho, and B. Zhang. Proceedings of the 2000 Congress on Evolutionary
Computation CEC00, 2, page 1451--1458. La Jolla Marriott Hotel La Jolla, California, USA, IEEE Press, (6-9 July 2000)