I. Ahmed, M. A. Roni, G. Kibria, M. R. Islam, and M. H. Rahman, “Effects of Plastic and Acrylate Polymers on the Release Profile of Ambroxol Hydrochloride Controlled Release Pellets”, Dhaka Univ. J. Pharm. Sci, vol. 7, no. 2, pp. 181–186, Mar. 2009.