Tore K. Bjerke, Tron H. Bjerke: Song Dialects in the Redwing Turdus iliacus. In: Ornis Scandinavica (Scandinavian Journal of Ornithology). Band12, Nr.1, 1981, ISSN0030-5693, S.40–50, doi:10.2307/3675903, JSTOR:3675903.
M. Debussche, P. Isenmann: An example of Redwing diet in a Mediterranean wintering area. In: Bird Study. Band32, Nr.2, Juli 1985, ISSN0006-3657, S.152–153, doi:10.1080/00063658509476871.
jstor.org
Tore K. Bjerke, Tron H. Bjerke: Song Dialects in the Redwing Turdus iliacus. In: Ornis Scandinavica (Scandinavian Journal of Ornithology). Band12, Nr.1, 1981, ISSN0030-5693, S.40–50, doi:10.2307/3675903, JSTOR:3675903.
zdb-katalog.de
Tore K. Bjerke, Tron H. Bjerke: Song Dialects in the Redwing Turdus iliacus. In: Ornis Scandinavica (Scandinavian Journal of Ornithology). Band12, Nr.1, 1981, ISSN0030-5693, S.40–50, doi:10.2307/3675903, JSTOR:3675903.
M. Debussche, P. Isenmann: An example of Redwing diet in a Mediterranean wintering area. In: Bird Study. Band32, Nr.2, Juli 1985, ISSN0006-3657, S.152–153, doi:10.1080/00063658509476871.