Proceedings of the 8th International Conference on Adaptive and Natural Computing Algorithms ICANNGA'07, Part 1, Volume 4431 von Lecture Notes in Computer Science (LNCS), Seite 167--173. Warsaw University of Technology, Warszawa, Poland, Springer Berlin Heidelberg New York, (April 2007)http://www.it-weise.de/documents/index.html#WGB2007DGPFb.