1 | Faculty of Mechanical Engineering, Lublin University of Technology, ul. Nadbystrzycka 36, 20-618 Lublin, Poland |
2 | Faculty of Economics, Maria Curie Skłodowska University, Pl. Marii Curie-Skłodowskiej 5, 20-031 Lublin, Poland |
3 | Faculty of Economics and Management, University of Zielona Góra, ul. Podgórna 50d, 65-246 Zielona Góra, Poland |
4 | Faculty of Electronics and Computer Science, Koszalin University of Technology, ul. Śniadeckich 2, 75-453 Koszalin, Poland |