Taxon - Odkazy a literatura
The Interim Register of Marine and Nonmarine Genera [1300960]
Rees, T. (compiler): The Interim Register of Marine and Nonmarine Genera [https://www.irmng.org] [jako Sphaerium Scopoli, 1777]
Datum citace: 30. listopad 2019
Paleobiology Database [62302]
Paleobiology Database [https://paleobiodb.org/] [jako Sphaerium Scopoli, 1777]
Datum citace: 13. prosinec 2015