Bojarinova, J., O. Babushkina, V. Shokhrin, och O. Valchuk. ”Autumn Migration of the Long-Tailed Tit (Aegithalos C. Caudatus) at the Opposite Sides of the Eurasian Continent”. Ornis Fennica, vol. 93, nr 4, december 2016, s. 235–245, doi:10.51812/of.133904.