Слонска костенурка (Bulgarian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Слонска костенурка" in Bulgarian language version.

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Rhodin, A.G.J. Turtles of the world, 2010 update: Annotated checklist of taxonomy, synonymy, distribution and conservation status // Chelonian Research Foundation, 2010. DOI:10.3854/crm.5.000.checklist.v3.2010. с. 33 – 34.

Chelonoidis niger (Quoy & Gaimard, 1824). // IUCN Red List of Threatened Species. International Union for Conservation of Nature. Посетен на 4 януари 2023 г. (на английски)
Tortoise & Freshwater Turtle Specialist Group. Chelonoidis nigra // IUCN Red List of Threatened Species. International Union for Conservation of Nature, 1996. Посетен на 11 януари 2012. (на английски)