Kumar, M., G. Kumar, V. K. Verma, M. Gupta, and R. K. Gautam. “A Study of Association of Vitamin D Deficiency and Coronary Artery Disease”. International Journal of Research in Medical Sciences, vol. 5, no. 5, Apr. 2017, pp. 1765-70, doi:10.18203/2320-6012.ijrms20171557.