1. SGH Warsaw School of Economics, Warsaw, Poland
2. The Bronisław Markiewicz State Higher School of Technology and Economics in Jarosław, Poland
3. University of Central Florida, Orlando, FL, USA
4. Akademia Leona Koźmińskiego, Warsaw, Poland
5. University of Economics in Poznan, Poland
6. Safety Consutant, Sławno, Poland
7. Avaleo, Warsaw, Poland
8. Department of Industrial Engineering, Gazi University, Ankara, Turkey