1. Fraser, R. D. B., MacRae, T.P., & Rogers, G. E. (1972). Keratins: Their composition, structure and biosynthesis (The Bannerstone division of American lectures in living chemistry, p. 320). Springfield: Charles C Thomas Publisher, Ltd.
2. Langbein, L., et al. (1999). The catalog of human hair keratins. I. Expression of the nine type I members in the hair follicle. Journal of Biological Chemistry, 274(28), 19874–19884.
3. Lee, Y. J., Rice, R. H., & Lee, Y. M. (2006). Proteome analysis of human hair shaft – From protein identification to posttranslational modification. Molecular & Cellular Proteomics, 5(5), 789–800.
4. Orwin, D. F. G. (1979). The cytology and cytochemistry of the wool follicle. International Review of Cytology, 60, 331–374.
5. Hill, P., Brantley, H., & Van Dyke, M. (2010). Some properties of keratin biomaterials: Kerateines. Biomaterials, 31(4), 585–593.