L. Spector. Proceedings of the Genetic and Evolutionary
Computation Conference (GECCO-2001), page 137--146. San Francisco, California, USA, Morgan Kaufmann, (7-11 July 2001)
L. Spector, H. Barnum, H. Bernstein, and N. Swamy. Proceedings of the Congress on Evolutionary
Computation, 3, page 2239--2246. Mayflower Hotel, Washington D.C., USA, IEEE Press, (6-9 July 1999)