1. Department of Ecology, Faculty of Humanities and Natural Sciences, University of Prešov, Presov, Slovakia;
2. Department of Chemistry, Faculty of Biotechnologies and Food Sciences, Slovak Agricultural University in Nitra, Nitra-Chrenová, Slovakia;
3. Department of Suitable Development, Faculty of European Studies and Regional Development, Slovak Agricultural University in Nitra, Nitra-Chrenová, Slovakia;
4. Department of Geography and Applied Geoinformatics, Faculty of Humanities and Natural Sciences, University of Prešov, Presov Slovakia