1. A Key to Hairs of the Mammals of Southern Michigan;Mathiak;Journal of Wildlife Management,1938
2. Adorjan AS and Kolenosky GB. A Manual for the Identification of Hairs of Selected Ontario Mammals. Research Report (Wildlife) No 90. Ontario: Department of Lands and Forests, 1969.
3. Etude en Microscopie Optique des Poils (Pili) de la Faune Pyrénéene Sauvage en vue de leur Determination;Faliu,1979
4. Identification of Hair and Feather Remains in the Gut and Faeces of Stoats and Weasels;Day;Journal of Zoology,1966
5. Guide to the Identification of Animal Fibres;Appleyard,1978