Mischenko, A.; Sukhanova, O.; Švažas, S.; Meshcheriakova, N.; Perkovskii, M.; Strelkov, V.; Czajkowski, A.; Vaitkuvienė, D. Internationally Important Stopover Area for the Globally-Threatened Common Pochard Aythya Ferina in the Volga River Delta. Wildfowl 2022, 72, 164-173.