J. Frýda, L. Ferrová, and B. Frýdová, “Review of palaeozygopleurid gastropods (Palaeozygopleuridae, Gastropoda) from Devonian strata of the Perunica microplate (Bohemia), with a re-evaluation of their stratigraphic distribution, notes on their ontogeny, and descriptions of new taxa”, Zootaxa, vol. 3669, no. 4, pp. 469–489, Jun. 2013.