9Miyamoto H,Miyashita T,Okushima M,et al.A carbonic anhydrase from the nacreous layer in oyster pearls. Proceedings of the National Academy of Sciences of the United States of America . 1996
10Meenakshi,VR,Hare,PE,Wilbur,KM.Amino acids of the organic matrix of neogastropod shells. Comparative Biochemistry and Physiology . 1971