1. Faculty of Science; Department of Geography; Palacký University Olomouc; Olomouc Czech Republic
2. Institute of Geography; Slovak Academy of Sciences; Bratislava Slovakia
3. Faculty of Natural Sciences; Department of Human Geography and Demography; Comenius University in Bratislava; Bratislava Slovakia
4. Department of Social Geography and Regional Development Planning; University of Debrecen; Debrecen Hungary