Porter, V., & Mason, I. L. (2002). Mason’s World Dictionary of Livestock Breeds, Types and Varieties (5th ed.). Wallingford, Oxfordshire, UK: CABI Publishing.
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.
Roth, D. (2001, March). Die Schwarzwaldziege - eine alte Rasse wirkt im Verborgenen. Gesellschaft zur Erhaltung alter und gefährdeter Haustierrassen e.V. (GEH). http://www.g-e-h.de/geh-lit/pdf_files/0103s18.pdf (in German)
United States. Bureau of Animal Industry. (1905). Annual Report of the Bureau of Animal Industry (Vol. 21). Washington, DC: U.S. Government Printing Office.