1. Faculty of Physics and Engineering Sciences, University of Surrey, Guildford GU2 7XH, UK
2. Department of Management and Accounting, SGH Warsaw School of Economics, 02-554 Warsaw, Poland
3. Department of Mechanical and Automobile Engineering, Technological University of the Shannon, Moylish Campus, Moylish Park, V94 EC5T Limerick, Ireland
4. Institute of Health Sciences, Opole University, 45-040 Opole, Poland