1) R. G. G. Russel, W. G. Robertson, and H. Fleisch, "Biological Mineralization," ed. by I. Zipkin, John Wiley and Sons, New York, 1973, Chap. 31, pp. 812-816.
2) a) R. E. Wuthier, S. Bisaz, R. G. G. Russel, and H. Fleisch, Calc. Tiss. Res., 10, 198 (1972);
b) J. J. Vogel, "Dental Biochemistry," 2nd ed., ed. by E. P. Lazzari, Lea and Febiger, Philadelphia, 1976, p. 106;