J. Stevens, R. Heckendorn, and T. Soule. GECCO 2005: Proceedings of the 2005 conference on
Genetic and evolutionary computation, 2, page 1605--1612. Washington DC, USA, ACM Press, (25-29 June 2005)
R. Oppermann, M. Schmidt, and D. Sherrington. Abstract Book of the XXIII IUPAP International Conference on Statistical Physics, Genova, Italy, (9-13 July 2007)