Havliček, V. (1982). Lingulacea, Paterinacea, and Siphonotretacea (Brachiopoda) in the Lower Ordovician sequence of Bohemia. Sborník Geologickych Vĕd. Paleontologie. 25: 9-82.
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Havliček, V.
1982
Lingulacea, Paterinacea, and Siphonotretacea (Brachiopoda) in the Lower Ordovician sequence of Bohemia