For citations:

Tertitski G.M. Changes in the Avifauna of Islands in the European Sector of the Russian Arctic in the 20th Century. Izvestiya Rossiiskoi Akademii Nauk. Seriya Geograficheskaya. 2025;89(5):779-792. (In Russ.) https://doi.org/10.7868/S2658697525050061