Ragav, E. D., and A. P. S. “Factors Responsible for Low Serum Vitamin-D Levels in Type-2 Diabetes Mellitus Females: A Cross-Sectional Study”. International Journal of Advances in Medicine, vol. 8, no. 5, Apr. 2021, pp. 636-43, doi:10.18203/2349-3933.ijam20211469.