Earle, R. R., K. K. Bandaru, and L. Usha A. “FORMULATION AND CHARACTERIZATION OF SUSTAINED RELEASE COATED MATRIX GRANULES OF METFORMIN HYDROCHLORIDE”. Asian Journal of Pharmaceutical and Clinical Research, vol. 11, no. 7, July 2018, pp. 387-92, doi:10.22159/ajpcr.2018.v11i7.24996.