1. G.Skja-Braek, T.Anthonsen and P.Sandford, Chitin and Chitosan: Sources. Chemistry. Biochemistry. Physical Properties and Applications, Elsevier, 1989
2. J.P.Zikakis (ed), Chitin. Chitosan and Related Enzymes, Academic, 1984
3. R.A.A.Muzzarelli. Chitin. Pergamon, 1977
4. N.K. Mathur and C.K. Narang, J.Chem.Ed., 62, 938 (1990)
5. P.R. Austin, C.J. Brine, J.E. Castle and J.P. Zikakis, Science, 212, 749 (1981)