1. Interpreting the Plant and Animal Remains from Viking-Age Kaupang;Barrett,2007
2. Eketorp, Befestigung und Siedlung auf Öland/Schweden, Die Fauna;Boessneck,1979
3. Zum Geschlechtsdimorphismus am Skelett mittelalterlicher Haushühner (Gallus gallus f. domestica);Benecke;Zool. Abhand.,1989
4. Roman evidence of a crested form of domestic fowl, as indicated by a skull showing associated cerebral hernia;Brothwell;J. Archaeol. Sci.,1979
5. The definition of a breed;Clutton-Brock,1979