Sandstone caves and rock cities of Bohemia

ADAMOVIČ, J., MIGON, P., GOLAB, Z., KOPECKÝ, J., JENKA, O., MERTLÍK, J., PEŠA, V., HAVRÁNEK, P., KUKLA, J., KOMAŠKO, A. Sandstone caves and rock cities of Bohemia. Praha: Czech Speleological Society and the SPELEO2013 and in the co-operation with the International Union of Speleology, 2013. ISBN 978-80-87857-11-3.