1. Faculty of Economics and Management, Institute of Marketing, Trade and Social Studies, Slovak University of Agriculture in Nitra, 94976 Nitra, Slovakia
2. Department of Mass Media Communication and Advertising, Faculty of Philosophy, Constantine the Philosopher University in Nitra, 94901 Nitra, Slovakia
3. Department of Trade and Finance, Faculty of Economics and Management, Czech University of Life Sciences Prague, 16500 Prague, Czech Republic