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2. G. W. Pond and W. A. Bell, “Encyclopedia of Animal Science”, pp.650–652, Marcel Dekker Publishing, New York, USA, 2005.
3. V. B. Kraus, “Textile Fiber Atlas”, p.17, American Wool Handbook Company, New York, 1942.
4. R. R. Franck, “Silk, Mohair, Cashmere and Other Luxury Fibres”, pp.68–71, Woodhead Textiles Series, No. 19, UK, 2001.
5. M. Shelton, “Angora Goat and Mohair Production”, pp.20–21, Texas A&M University, Texas Agricultural Experiment Station, Lecture Notes, 2007.