R. Popp, D. Montana, R. Gassner, G. Vidaver, and S. Iyer. IEEE International Conference on Systems, Man, and
Cybernetics, 3, page 2184--2189. San Diego, CA USA, IEEE, (11-14 October 1998)
R. Curry, and M. Heywood. Proceedings of the IEEE International Conference on
Systems, Man, and Cybernetics, page 1938--1945. Montreal, IEEE Press, (7-10 October 2007)