Svinin Anton, Bashinskiy Ivan, Litvinchuk Spartak, Neymark Leonid, Osipov Vitaly, Katsman Elena, Ermakov Oleg, Ivanov Aleksander, Vedernikov Aleksander, Drobot Galina & Dubois Alain, 2019 — First record of the Jean Rostand’s "anomaly P" in the marsh frog, Pelophylax ridibundus, in central Russia. Alytes vol. 37, , p. 31-45