1. Sanford, P.A., 1989, Chitosan: Commercial Uses and Potential Applications. In Chitin and Chitosan: Sources, Chemistry, Biochemistry, Physical Properties and Applications (G. Skjåk-Braek, T. Anthonsen, P. Sanford, eds.) Elsevier Applied Science, London, pp.51–69.
2. Tan, S.C., Eugene, K., Tan, T.K., and Wong, S.M., 1998, The degree of acetylation of chitosan: advocating the first derivative UV—spectrophotometry method of determination. Talanta, 45: 713–719.
3. Brugneretto, J., Lizardi, J., Goycoolea, F.M., Argülles-Monal, W., Desbrieres, J., and Rinaudo, M., 2001, An infrared Investigation in relation with chitin and chitosan characterization. Polymer, 42: 3569–3580.
4. Okuyama, K., Noguchi K, Kanenari M, Egawa T, Osawa K, and Ogawa K, 2000, Structural diversity of chitosan and its complexes. Carbohydrate Polymers, 42: 237–247.
5. Anthonsen, M.W., Varum, K.M., and Smidsrod, O.,1993, Solution properties of chitosans with different degrees of N-acetylation. Carbohydrate Polymers, 22: 193–201.