M. Streeter, M. Keane, and J. Koza. Preprints of the 2003 Intelligent Control Systems and
Signal Processing Conference, page 494--499. Faro, Portugal, (2003)
M. Akbarzadeh-T., E. Tunstel, K. Kumbla, and M. Jamshidi. Proceedings of the 1998 IEEE World Congress on
Computational Intelligence, 2, page 1200--1205. Anchorage, Alaska, USA, IEEE Press, (5-9 May 1998)