Ahmed, I., M. A. Roni, G. Kibria, M. R. Islam, and R.- ul Jalil. “<i>In vitro</I> Release Kinetics Study of Ambroxol Hydrochloride Pellets Developed by Extrusion Spheronization Technique Followed by Acrylic Polymer Coating”. Dhaka University Journal of Pharmaceutical Sciences, vol. 7, no. 1, Oct. 2008, pp. 75-81, doi:10.3329/dujps.v7i1.1222.