C. Guerra-Salcedo, and D. Whitley. Proceedings of the Genetic and Evolutionary
Computation Conference, 1, page 236--243. Orlando, Florida, USA, Morgan Kaufmann, (13-17 July 1999)
C. Guerra-Salcedo, and D. Whitley. Genetic Programming 1998: Proceedings of the Third
Annual Conference, page 504--509. University of Wisconsin, Madison, Wisconsin, USA, Morgan Kaufmann, (22-25 July 1998)
C. Ferrari, and C. Guerra. Mathematical Methods for Protein Structure Analysis and Design, volume 2666 of Lecture Notes in Computer Science, page 57-82. Springer, (2003)