%0 Journal Article %T Response Surface Optimization of Sustained Release Metformin-Hydrochloride Matrix Tablets: Influence of Some Hydrophillic Polymers on the Release %A Amitava Roy %A Kalpana Roy %A Sarbani Roy %A Jyotirmoy Deb %J ISRN Pharmaceutics %D 2012 %I Hindawi Publishing Corporation %R 10.5402/2012/364261 %U http://dx.doi.org/10.5402/2012/364261