BERNARD, Jan Hus. Empirical types of ore mineralizations in the Bohemian Massif. Prague : Geological Survey, 1991. 181 s. Available on Internet: <http://www.geology.cz/extranet/publikace/online/vyznamne-publikace/EMPIRICAL_TYPES_OF_ORE_MINERALIZATIONS_IN_THE_BOHEMIAN_M.pdf> ISBN 80-7075-006-5.