Khatri, M. “Circulating Biomarkers of Oxidative Stress in Normal Pregnancy and Preeclampsia and Efficacy of Antioxidant Supplementation”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 2, no. 3, Dec. 2016, pp. 304-10, https://www.ijrcog.org/index.php/ijrcog/article/view/98.