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Použité zdroje
Chlupáč I., Turek V. (1983): Devonian goniatites from the Barrandian area, Czechoslovakia, Academia, Ústřední ústav geologický, 159 pp
Jan Ove R. Ebbestad & Richard A. Fortey (2019): Late Ordovician trilobites from the Taimyr Peninsula, Arctic Russia, Journal of Systematic Palaeontology, 18:1, 1-135
Kříž J. (2008): A new bivalve community from the lower Ludlow of the Prague Basin (Perunica, Bohemia), Bulletin of Geosciences 83(3), 237–280
Turek V. (2008): Boionautilus gen. nov. from the Silurian of Europe and North Africa (Nautiloidea, Tarphycerida), Bulletin of Geosciences 83(2), 141–152
Van Roy P. (2006): Non-trilobite arthropods from the Ordovician of Morocco, Ghent University, Ph. D. dissertation, 230 pp. Unpublished.
Vinn O., Madison A. (2017): Cornulitids from the Upper Ordovician of northwestern Russia, Carnets Geol. 17 (12)