1. Institute of Electrical Engineering, Automation, Informatics and Physics, Faculty of Engineering Slovak University of Agriculture in Nitra Tr. A. Hlinku 2 949 76 Nitra Slovakia
2. Institute of Technology and Business in České Budějovice Faculty of Technology Department of Mechanical Engineering Okružní 10 370 01 České Budĕjovice Czech Republic
3. Technical University of Koszalin Faculty of Mechanical Engineering Department of Energy 15–17 Raclawicka St. 75-620 Koszalin Poland
4. Technical University of Košice Faculty of Manufacturing Technologies with the seat in Prešov Department of Automobile and Manufacturing Technologies Štúrova 31 Prešov 080 01 Slovakia