For citations:
Derko A.A., Dubovitskiy N.A., Murashkina T.A., Sobolev I.A., Solomatina M.V., Alekseev A.Yu., Magomedov M.G., Mine J., Uchida Yu., Saito T., Kallaeva M.M., Sharshov K.A. Avian paramyxovirus 4 isolated from the mallard (Anas platyrhynchos, Linnaeus, 1758): the first case detected in the Western Caspian region. South of Russia: ecology, development. 2021;16(3):81‐87. (In Russ.) https://doi.org/10.18470/1992-1098-2021-3-81-87