1. Department of Business Economics, Faculty of Wood Sciences and Technology, Technical University in Zvolen, T. G. Masaryka 24, 960 53, Zvolen, Slovak Republic
2. Faculty of Social-Economics Relationship, Alexander Dubcek University of Trencin , Studentska 1638/3, 911 50 Trencin, Slovak Republic
3. Faculty of Corporate Strategy, The Institute of Technology and Business in Ceske Budejovice, Czech Republic