Taxon - Odkazy a literatura
Paleobiology Database [13850]
Paleobiology Database [https://paleobiodb.org/] [jako Protornoceras Dybczynski, 1913]
Datum citace: 13. prosinec 2015
The Interim Register of Marine and Nonmarine Genera [1102511]
Rees, T. (compiler): The Interim Register of Marine and Nonmarine Genera [https://www.irmng.org] [jako Protornoceras Dybczynski, 1913]
Datum citace: 30. listopad 2019