1. Barrnett, R. J., Sognnaes, R. F.: Histochemical distribution of protein-bound sulfhydryl and disulfide groups in vertebrate keratins. In: Fundamentals of keratinization (eds. E. O. Butcher and R. F. Sognnaes). Publ. No. 70 of the American Association of the Advancement of Science, 27–43 (1962).
2. Guss, S. B., Ugel, A. R.: Immunofluorescent antibodies to bovine keratohyalin and immunologic confirmation of homology. J. Histochem. Cytochem. 20, 97–106 (1972).
3. Hayat, M. A.: Principles and techniques of electron microscopy: Biological applications, vol. 1. New York: Van Nostrand Reinhold Company 1970.
4. Hendricks, D. M., Mayer, D. T.: Isolation and characterization of a basic keratin-like protein from mammalian spermatozoa. Exp. Cell Res. 40, 402–412 (1965).
5. Jessen, H.: Two types of keratohyalin granules. Proc. 7th Int. Congr. Electron Microscopy, Grenoble 3, 221–222 (1970a).