1. Chitin, Pergamon Press, NY (1977).
2. “Substantially undegraded deacetylated chitin and process for producing the same,” U.S. Patent 2,040,879 (May 19, 1936)
3. “Chemical products and process of preparing the same,” U.S. Patent 2,072,771 (Mar. 2, 1937).
4. and , “Chitosan and Chitosan Derivatives for Removal of Toxic Metal Ions from Manufacturing Plant Waste,” in Proc. 1st Intl. Conf. Chitin and Chitosan, p. 286, and , Eds., MIT Sea Grant 78–7, Cambridge, MA (1978).
5. Binding sites of copper2+ in chitin and chitosan. An electron spin resonance study