M. M. Rahman, M. S. Islam, N. Sharmin, J. A. Chowdhury, and R.- ul Jalil, “Preparation and Evaluation of Cellulose Acetate Phthalate and Ethyl cellulose based Microcapsules of Diclofenac Sodium using Emulsification and Solvent-Evaporation Method”, Dhaka Univ. J. Pharm. Sci, vol. 9, no. 1, pp. 39–46, Apr. 2011.