Marova, I., V. Ivanitskii, I. Ilina, A. Pecheneva, P. Kvartalnov, Y. Belocon, and M. Belokon. “A New Contact Zone in the Chiffchaff Distribution Range: Caucasian and European Subspecies Meet Each Other in the South of Russia”. 2024. Ornis Fennica, vol. 101, no. 1–2, Oct. 2024, pp. 16-27, doi:10.51812/of.131719.