Brocks, D. et al. 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 (Nov. 2010), 486–494. DOI:https://doi.org/10.18433/J32C71.