Taxon - Odkazy a literatura
Paleobiology Database [299126]
Paleobiology Database [https://paleobiodb.org/] [jako Isorthis Kozlowski, 1929]
Datum citace: 14. prosinec 2015
The Interim Register of Marine and Nonmarine Genera [1286750]
Rees, T. (compiler): The Interim Register of Marine and Nonmarine Genera [https://www.irmng.org] [jako Isorthis Kozlowski, 1929]
Datum citace: 13. únor 2020
Mergl M. (2003): Silicified brachiopods of the Kotýs Limestone (Lochkovian) in the Bubovice area (Barrandian, Bohemia), Acta Mus. Nat. Pragae, Ser. B, Hist. Nat., 59 (3–4): 99–150. Praha [jako Isorthis Kozlowski, 1929]