1. M. Yoshikawa and H. Chiba, Abstracts of Papers and Posters, the Hannah Casein Conference, 1988.
2. D. F. Waugh, “Milk Protein,” Vol. II. ed. by H. A. McKenzie, Academic Press, New York, 1970, Chapter 9.
3. D. C. Schmidt, “Development in Dairy Chemistry-1,” ed. by P. F. Fox, Applied Science Publishers, London, 1982, Chapter, 2.