Grunenfelder, H.-P., Müller, N., & Bussaglia, U. (2003). Agricultural Genetic Resources in the Alps. St.Gallen, Switzerland: Monitoring Institute for Rare Breeds and Seeds in Europe.
Porter, V. & Mason, I. L. (2002). Mason’s World Dictionary of livestock breeds, types and varieties (5th ed.). Wallingford, Oxfordshire, UK: CABI.
Porter, V., Alderson, L., Hall, S. J. G., & Sponenberg, D. P. (2016). Mason’s World Encyclopedia of Livestock Breeds and Breeding: 2 volume pack (1st ed.). Wallingford, Oxfordshire, UK: CABI.