1. Professor, Power and Transport Machinery Engineering Institute, Aleksandras Stulginskis Univ., Student St., 15, Kaunas Academy, Akademija 53361, Lithuania (corresponding author).
2. Professor, Power and Transport Machinery Engineering Institute, Aleksandras Stulginskis Univ., Student St., 15, Kaunas Academy, Akademija 53361, Lithuania.
3. Lecturer, Power and Transport Machinery Engineering Institute, Aleksandras Stulginskis Univ., Student St., 15, Kaunas Academy, Akademija 53361, Lithuania.