1. SLOVAK UNIVERSITY OF TECHNOLOGY IN BRATISLAVA , FACULTY OF MATERIALS SCIENCE AND TECHNOLOGY IN TRNAVA, INSTITUTE OF PRODUCTION TECHNOLOGIES , ULICA JÁNA BOTTU 2781/25 , TRNAVA , Slovak Republic
2. SLOVAK UNIVERSITY OF TECHNOLOGY IN BRATISLAVA , FACULTY OF MATERIALS SCIENCE AND TECHNOLOGY IN TRNAVA, INSTITUTE OF MATERIALS SCIENCE , ULICA JÁNA BOTTU 2781/25 , TRNAVA , Slovak Republic