V. Bozhikova, and M. Stoeva. Proceedings of the 11th International Conference on Computer Systems and Technologies and Workshop for PhD Students in Computing on International Conference on Computer Systems and Technologies, page 119--124. New York, NY, USA, ACM, (2010)
C. Gagné, and M. Parizeau. GECCO 2002: Proceedings of the Genetic and
Evolutionary Computation Conference, page 888. New York, Morgan Kaufmann Publishers, (9-13 July 2002)