Experimental Radiological Monitoring in the Saeva Dupka Cave (Bulgaria)

STEFANOV, P., TUREK, K., SVĚTLÍK, I., GUELEV, M. Experimental Radiological Monitoring in the Saeva Dupka Cave (Bulgaria). In: Conference on 30th Anniversary of the Department of Geography of University of Veliko Tarnovo. St. Cyril and St. Metodius. Veliko Tarnovo: "IVIS", 2014, s. 73-81. ISBN 978-954-2968-96-2.