1. AbuRuz, S.; Millership, J.; McElnay, J., The development and validation of liquid chromatography method for the simultaneous determination of metformin and glipizide, gliclazide, glibenclamide or glimperide in plasma. J. Chromatogr. B, 2005, 817, 277–286.
2. Ali, I.; Aboul-Enein, H. Y.; Gupta, V. K., Analysis of Metformin Dosage Formulations by Capillary Electrophoresis at Nano Scale Detection. Comb. Chem. High Throughput Screen. 2007, 10, 611–615.
3. Al-Rimawi, F. Development and validation of an analytical method for metformin hydrochloride and its related compound (1-cyanoguanidine) in tablet formulations by HPLC-UV. Talanta, 2009, 79, 1368–1371.
4. Arayne, M. S.; Sultana, N.; Zuberi, M. H.; Siddiqui, F. A.; Haroon, U., Simultaneous determination of metformin, captopril, lisinopril, and enalapril by RP-HPLC: its applications in dosage formulations and in human serum. Med. Chem. Res. 2013, 22, 5717–5722.