1. Hayes, E.R., Davies, D.H., Munroe, V.G.: Proceedings of the first international conference on chitin and chitosan, Boston, Massachusetts, p. 103. MIT Sea Grant Program, Cambridge (1978)
2. East, G.C., Qin, Y.: J. Appl. Polym. Sci. 50, 1773 (1993)
3. Hirano, S., Midorikawa, T.: Biomaterials 19, 293 (1998)
4. Knaul, J., Hooper, M., Chanyi, C., Creber, K.A.M.: J. Appl. Polym. Sci. 69, 1435 (1998)
5. Hirano, S., Nakahira, T., Nakagawa, M., Kim, S.K.: J. Biotechnol. 70, 373 (1999)