Abdul Munim Al-Thanoon, Zeina, et al. “Effects of Metformin Alone or in Combination With Vitamin C and E on Serum Glucose Concentration and Lipid Profile in Type 2 Diabetic Patients”. Tikrit Journal of Pharmaceutical Sciences, vol. 9, no. 2, Apr. 2023, pp. 193-01, doi:10.25130/tjphs.2013.9.2.1.193.201.