1. Management College, Ocean University of China, Qingdao, China
2. Faculty of Economics, Matej Bel University, Tajovského, Banská Bystrica, Slovakia
3. Faculty of Civil Engineering, Slovak University of Technology, Radlinského, Bratislava, Slovakia
4. Department of Algebra & Geometry, Faculty of Science, Palacky University Olomouc, Olomouc, Czech Republic
5. Machine Intelligence Institute, Iona College, New Rochelle, NY, USA
6. Business School, Nanjing Normal University, Nanjing, China