1. Chair of Materials and Forming, University of Maribor, Faculty of Mechanical Engineering , Smetanova Ulica 17 , 2000 Maribor , Slovenia
2. Zlatarna Celje D.O.O. , Kersnikova Ulica 19 , 3000 Celje , Slovenia
3. Chair for Power, Process and Environmental Engineering, University of Maribor, Faculty of Mechanical Engineering , Smetanova Ulica 17 , 2000 Maribor , Slovenia
4. Department of Neurologic Diseases, Medical Research Department, University Medical Centre Maribor , Ljubljanska Ulica 5 , 2000 Maribor , Slovenia