1. MTA-PE Budapest Ranking Research Group, Budapest, Hungary
2. Faculty of Business and Economics, Institute of Management, Department of Quantitative Methods, University of Pannonia, Veszprem, Hungary
3. Institutes of Advanced Studies, Köszeg (iASK), Koszeg, Hungary
4. Department of Mathematics, University of Pannonia, Veszprem, Hungary
5. Wigner Research Center for Physics, Budapest, Hungary
6. VIAS – Virtual Institute of Advances Studies