R. Kern, M. Muhr, and M. Granitzer. Proceedings of the 5th International Workshop on Semantic Evaluation, page 351--354. Stroudsburg, PA, USA, Association for Computational Linguistics, (2010)
M. O'Neill, C. Ryan, M. Keijzer, and M. Cattolico. Genetic Programming, Proceedings of EuroGP'2001, volume 2038 of LNCS, page 337--347. Lake Como, Italy, Springer-Verlag, (18-20 April 2001)
R. Cleary, and M. O'Neill. Evolutionary Computation in Combinatorial Optimization
-- EvoCOP~2005, volume 3448 of LNCS, page 34--45. Lausanne, Switzerland, Springer Verlag, (30 March-1 April 2005)