C. Wu, L. Huang, and L. Kang. Proceedings of 2005 International Conference on
Machine Learning and Cybernetics, 5, page 2870--2873. IEEE, (18-21 August 2005)
H. Jäske. Proceedings of the Second Nordic Workshop on Genetic
Algorithms and their Applications (2NWGA), page 79--88. Vaasa (Finland), University of Vaasa, (19.-23.~August 1996)