Bibliography

Borkin, L. J., A. V. Korshunov, G. A. Lada, S. N. Litvinchuk, J. M. Rosanov, D. Shabanov, and O. I. Zinenko. 2004. Mass occurrence of polyploid Green Frogs (Rana esculenta complex) in eastern Ukraine. Russian Journal of Herpetology 11: 194–213.