1. COMTES FHT a. s., 334 41 Dobrany, Czech Republic
2. Regional Technological Institute, University of West Bohemia, 301 00 Plzen, Czech Republic
3. Department of Materials and Engineering Metallurgy, University of West Bohemia, 301 00 Plzen, Czech Republic
4. Institute of Metals and Technology (IMT), 1000 Ljubljana, Slovenia
5. New Technologies Research Centre, University of West Bohemia, 301 00 Plzen, Czech Republic