Tubino, M., Bianchessi, L. F., & Vila, M. M. D. C. (2016). Microgravimetric method for the determination of metformin in pharmaceutical preparations and in the bulk drug. Eclética Química, 40(1), 62–70. https://doi.org/10.26850/1678-4618eqj.v40.1.2015.p62-70