For citations:

Romanova E.B., Ryabinina E.S., Boryakov A.V. Heavy Metal Accumulation in the Tissues and Organs of Pelophylax ridibundus (Pallas, 1771) and Pelophylax lessonae (Camerano, 1882) (Amphibia: Ranidae) Living in the Waterbodies of Nizhniy Novgorod. Povolzhskiy Journal of Ecology. 2020;(3):336-352. (In Russ.) https://doi.org/10.35885/1684-7318-2020-3-336-352