S. K., T., D. N., P. S., R. S. N., D. S., M. S. K., P. M., M. B., and B. M. R. “The Correlation of Cardiovascular Risk Factors and Angiographic Findings With Serum Vitamin D Levels in Patients Undergoing Coronary Angiography”. International Journal of Basic & Clinical Pharmacology, vol. 7, no. 1, Dec. 2017, pp. 32-37, doi:10.18203/2319-2003.ijbcp20175535.