Frýda, J., Ferrová, L. and Frýdová, B. 2013. 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. 3669, 4 (Jun. 2013), 469–489. DOI:https://doi.org/10.11646/zootaxa.3669.4.3.