Bek, Jiří - Opluštil, S.
Some lycopsid, sphenopsid and pteropsid fructifications and their miospores from the Upper Carboniferous basins of the Bohemian Massif.
Palaeontographica Abteilung B-Palaeophytologie Palaeobotany-Palaeophytology. Roč. 248, - (1998), s. 127-161. ISSN 2194-900X. E-ISSN 2509-839X
http://hdl.handle.net/11104/0042241