1. Buxton, P. A. (1921). Notes on birds from northern and western Persia. Journal of the Bombay Natural History Society 27(4):844–882.
2. Yavin, S. (1987). Nest site selection of the Great Tit Parus major terrae-sanctae. Ph.D. dissertation, Tel-Aviv University, Tel-Aviv, Israel.
3. Eck, S., and J. Martens (2006). Systematic notes on Asian birds. 49. A preliminary review of the Aegithalidae, Remizidae and Paridae. Zoologsiche Mededelingen Leiden 80(5):1–63.
4. Jenni, L., and R. Winkler (2020). Moult and Ageing of European Passerines. Second edition. Bloomsbury, London, UK.
5. Ecology of Birds in the Karakum Desert