1. Institute of Geodesy, Cartography and GIS, Faculty of Mining, Ecology, Process Control and Geotechnologies, Technical University of Košice, Park Komenského 19, 040 01 Košice, Slovakia
2. Department of Geodesy and Mine Surveying, Faculty of Mining and Geology, VŠB Technical University Ostrava, 17. Listopadu 15, 70800 Ostrava-Poruba, Czech Republic
3. Department of Geography, Faculty of Education, Catholic University in Ružomberok, Hrabovská Cesta 1, 031 04 Ružomberok, Slovakia
4. State Nature Conservancy of the Slovak Republic, Slovak Caves Administration, Hodžova 11, 031 01 Liptovský Mikuláš, Slovakia