1. Documenta Archaeobiologiae 3;U Albarella,2005
2. Barnes, I., and K. Dobney. 2000. DNA-based identification of goose species from two archaeological sites in Lincolnshire. Journal of Archaeological Science 27: 91–100.
3. Boessneck, J., and A. Von den Driesch. 1979. Eketorp. Befestigung und Siedlung auf Oland/Schweden. Die Fauna. Stockholm: Almqvist & Wiksell.
4. Ericson, P.G.E., and T. Tyrberg. 2004. The early history of Swedish avifauna. A review of the fossil record and early written sources. Stockholm: Kungliga Vitterhets Historie och Antikvitets Akademien.
5. Gray, A.P. 1958. Bird hybrids. A check-list with bibliography. Farnham Royal: Commonwealth Agricultural Bureaux.