Authors
Miroslav Dravecký
The Eastern Slovak Museum, Námestie Maratónu mieru 2, SK-04001 Košice, Slovakia
Petar Shurulinkov
National Museum of Natural History, Bulgarian Academy of Sciences, Bulgaria
Georgi Dilovski
Bulgaria
Michal Revický
Pieniny National Park, Slovakia
Girgina Daskalova
Bulgaria
Ján Obuch
Slovak Museum of Nature Protection and Speleology, Slovakia