Akhtar, Nazma, et al. “Effects of Metformin on Polycystic Ovary Syndrome: A Randomized, Double-Blind, Placebo-Controlled Study”. IMC Journal of Medical Science, vol. 15, no. 2, Aug. 2021, pp. 1-12, https://banglajol.info/index.php/IMCJMS/article/view/55808.