S. Rouwhorst, and A. Engelbrecht. Proceedings of the 2000 Congress on Evolutionary
Computation CEC00, 1, page 633--638. La Jolla Marriott Hotel La Jolla, California, USA, IEEE Press, (6-9 July 2000)
H. Cao, L. Kang, T. Guo, Y. Chen, and H. de Garis. IEEE Transactions on Systems, Man and Cybernetics --
Part B: Cybernetics, 40 (2):
351--357(April 2000)