1. Dr. M. Gholami-Kermanshahi, Prof V. Neubert, M. Tavakoli; Institute for Materials Testing and Materials Technology Dr. Neubert GmbH; Freiberger Straße 1; 38678 Clausthal-Zellerfeld Germany
2. V. D. Neubert; Materials Science and Engineering, Werkstoffzentrum Clausthal GmbH; Sachsenweg 8; 38678 Clausthal-Zellerfeld Germany
3. Dr. F. Pastorek; Research Center of the University of Žilina; Slovak Republic
4. Dr. B. Smola, Faculty of Mathematics and Physics; Charles University; Prague Czech Republic