Wielstra, B., Litvinchuk, S.N., Naumov, B., Tzankov, N. & Arntzen, J.W. (2013) A revised taxonomy of crested newts in the Triturus karelinii group (Amphibia: Caudata: Salamandridae), with the description of a new species. Zootaxa, 3682 (3), 441–453.