M. N., M., A. Kumar, R. M. V., and S. C. S. “Correlation of Pre-Operative Vitamin D3 Levels With Post-Operative Hypocalcemia in Patients Undergoing Total Thyroidectomy”. International Surgery Journal, vol. 7, no. 1, Dec. 2019, pp. 128-32, doi:10.18203/2349-2902.isj20195957.