U. Quasthoff, M. Richter, and C. Biemann. Proceedings of the fifth international conference on Language Resources and Evaluation, LREC, page 1799-1802. Genoa, (2006)
E. Korkmaz, and G. Ücoluk. GECCO 2002: Proceedings of the Genetic and
Evolutionary Computation Conference, page 891. New York, Morgan Kaufmann Publishers, (9-13 July 2002)