Marova, I., Ivanitskii, V., Ilina, I., Pecheneva, A., Kvartalnov, P., Belocon, Y., & Belokon, M. (2024). A new contact zone in the Chiffchaff distribution range: Caucasian and European subspecies meet each other in the south of Russia. Ornis Fennica, 101(1–2), 00–00. https://doi.org/10.51812/of.131719