Havliček, V. (1965). Superfamily Orthotetacea (Brachiopoda) in the Bohemian and Moravian Paleozoic. Vestnik Ustredniho Ustavu Geologickeho. 40: 291-294.
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Havliček, V.
1965
Superfamily Orthotetacea (Brachiopoda) in the Bohemian and Moravian Paleozoic