[Baillie S. R., Swann R. L. 1980. The extent of post-juvenile moult in the Blackbird. Ring. & Migr. 3: 21-26.10.1080/03078698.1980.9673756]Search in Google Scholar
[Busse P. 1984. Key to sexing and ageing of European Passerines. Beitr. Natur. Niedersachsens 37, Suppl.: 1-224.]Search in Google Scholar
[Ginn H. B., Melville D. S. 1983. Moult in Birds. BTO Guide 19, Tring.]Search in Google Scholar
[Jenni L., Winkler R. 1994. Moult and Ageing of European Passerines. Acad. Press, London.]Search in Google Scholar
[Svensson L. 1992. Identification Guide to European Passerines. Svensson, Stockholm.]Search in Google Scholar