A. Homaifar, D. Battle, and E. Tunstel. Computational Intelligence in Robotics and Automation,
CIRA '99. Proceedings. 1999 IEEE International
Symposium on, page 35--40. (8-9 November 1999)
A. Geyer-Schulz. Genetic Algorithms and Soft Computing, volume 8 of Studies in Fuzziness and Soft Computing, page 658--682. Heidelberg, Physica-Verlag, (September 1996)