Permissions for installation of prototype device from the • Slovak hydrometeorological institute in Bratislava; • State enterprise Forests of the Slovak Republic; • District Office for the Environment in Košice; • State Nature Conservancy of the Slovak Republic - Slovak Caves Administration; • Regional Authority of Public Health in Rožňava; • District Office for the Environment in Rožňava; • Land and Forest Department of the District Office in Rožňava; • Slovak Water Management Enterprise in Banská Bystrica are available in PDF format in the section Project results / DOCUMENTS / Documents.