1. Department of Corporate Financial Management , University of Economics in Bratislava , Faculty of Business Economics with seat in Košice , Tajovského 13, 040 01 Košice , Slovak Republic
2. Department of Economics and System Control , VŠB – Technical University of Ostrava , Faculty of Mining and Geology , 17. Listopadu 15, Ostrava – Poruba , Czech Republic
3. Technical University of Košice , Faculty of Mining, Ecology, Process Control and Geotechnology , Letná 9, 042 00 Košice , Slovak Republic