Pradeep Paudel; Hasan Mujtaba Noori; Bhupendra Kumar Poudel; Sujana Shakya; Pawan Bhatta; Shrawani Lamichhane. Influence of Different Grades and Concentrations of Hydroxypropyl Methyl Cellulose on the Release of Metformin Hydrochloride. World J Pharm Sci 2014, 2, 966-980.