1. Allen, T., 1975. Particle Size Measurements, 2nd edn. Chapman & Hall, London, p. 74.
2. Austen, P., 1984. Chitin solvents and solubility parameters. In: Zikakis, J.P. (Ed.), Chitin, Chitosan and Related Enzymes. Academic, New York, p. 277.
3. Austen, P., Sennet, S., 1986. Dry chitosan salts and complexes of diphatic carboxylic acid. In: Muzzarelli, R., Jeuniaux, C., Gooday, G.W. (Eds.), Chitin in Nature and Technology. Plenum, New York, p. 279.
4. Banker, G., Anderson, R., 1987. The Theory and Practice of Industrial Pharmacy, 3rd edn. p. 317.
5. Casein microbeads as a controlled parenteral drug delivery system;Bayomi;Drug Dev. Ind. Pharm.,1994