S.  Suzuki and Uozumi, S., ?Organic components of prismatic layers in molluscan shells?, Journal of the Faculty of Science, Hokkaido University. Series 4. Geology and Mineralogy, vol. 20, pp. 7-20, 1981.

G.  Rosenberg, The encyclopedia of seashells. New York: Dorset Press, 1992, p. 224.

G.  Rosenberg, The encyclopedia of seashells. New York: Dorset Press, 1992, p. 224.

S.  Suzuki and Uozumi, S., ?Organic components of prismatic layers in molluscan shells?, Journal of the Faculty of Science, Hokkaido University. Series 4. Geology and Mineralogy, vol. 20, pp. 7-20, 1981.