Brocks, D., Gabr, R. Q., & Padwal, R. S. (2010). Determination of Metformin in Human Plasma and Urine by High-Performance Liquid Chromatography Using Small Sample Volume and Conventional Octadecyl Silane Column. Journal of Pharmacy & Pharmaceutical Sciences, 13(4), 486–494. https://doi.org/10.18433/J32C71