%0 Journal Article %T Ethyl Cellulose Microparticles Containing Metformin HCl by Emulsification-Solvent Evaporation Technique: Effect of Formulation Variables %A Ruma Maji %A Somasree Ray %A Biswarup Das %A Amit Kumar Nayak %J ISRN Polymer Science %D 2012 %I Hindawi Publishing Corporation %R 10.5402/2012/801827 %U http://dx.doi.org/10.5402/2012/801827