Taxon - Odkazy a literatura
The Interim Register of Marine and Nonmarine Genera [1295181]
Rees, T. (compiler): The Interim Register of Marine and Nonmarine Genera [https://www.irmng.org] [jako Petrozium Smith, 1930]
Datum citace: 29. listopad 2019
Paleobiology Database [5770]
Paleobiology Database [https://paleobiodb.org/] [jako Petrozium Smith, 1930]
Datum citace: 11. prosinec 2015