(en) Sergi Herrando, Petr Voříšek et European Bird Census Council, European breeding bird atlas 2 distribution, abundance and change, Barcelona, European Bird Census Council & Lynx Edicions, , 968 p. (ISBN978-84-16728-38-1 et 84-16728-38-0, OCLC1227275451, lire en ligne), p. 267