Arshiya, K., and S. Meenakshi. “An Evaluation of Association of Vitamin D Insufficiency With Gestational Hypertension in Pregnant Women”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 7, no. 8, July 2018, pp. 3109-12, doi:10.18203/2320-1770.ijrcog20183299.