Taxon - Links and literature
ASM Mammal Diversity Database 2.1 [1005927]
ASM Mammal Diversity Database [https://www.mammaldiversity.org/], American Society of Mammalogists [as Pusa caspica (J. F. Gmelin, 1788)]
Data retrieved on: 29 May 2025
de Jong, Y.S.D.M. (ed.): Fauna Europaea 2.4 [http://www.faunaeur.org] [as Phoca caspica Gmelin, 1788]Data retrieved on: 9 March 2012
IUCN Red List of Threatened Species 2024-1 [41669]
IUCN Red List of Threatened Species [http://www.iucnredlist.org/] [as Pusa caspica (Gmelin, 1788)]
Data retrieved on: 29 January 2024
Wilson D. E., Reeder D. M. (editors) (2005): Mammal Species of the World (MSW). A Taxonomic and Geographic Reference (3rd ed) [http://www.bucknell.edu/msw3] [as Pusa caspica Gmelin, 1788]Data retrieved on: 5 December 2008
Paleobiology Database [174519]
Paleobiology Database [https://paleobiodb.org/] [as Phoca caspica Nilsson, 1837]
Data retrieved on: 3 February 2017
Anděra M. (1999): České názvy živočichů II. Savci (Mammalia), Národní muzeum, (zoologické odd.), Praha, 147 pp. [as Phoca caspica Gmelin, 1788]