1. University of Life Science in Lublin , Faculty of Production Engineering , 20-612 Lublin , Poland
2. University of Zilina , Faculty of Operation and Economics of Transport and Communications , Univerzitná 1, 010 26 Žilina , Slovakia
3. University of Zilina , Faculty of Mechanical Engineering , Univerzitná 1, 010 26 Žilina , Slovakia
4. Lublin University of Technology , Mechanical Engineering Faculty , 20-618 Lublin , Poland