Taxon - Odkazy a literatura
Gill F., Donsker D. & Rasmussen P. (eds): IOC World Bird List 11.1 [http://www.worldbirdnames.org/] [jako Creagrus Bonaparte, 1854]Datum citace: 22. duben 2021
The Interim Register of Marine and Nonmarine Genera [1293021]
Rees, T. (compiler): The Interim Register of Marine and Nonmarine Genera [https://www.irmng.org] [jako Creagrus Bonaparte, 1854]
Datum citace: 30. listopad 2019
Paleobiology Database [276251]
Paleobiology Database [https://paleobiodb.org/] [jako Creagrus Bonaparte, 1854]
Datum citace: 13. prosinec 2015