Shivakumar, S., N. Ravishankar, and V. R. Chapparapu. “Evaluation of Color Doppler Study of Thyroid Swellings: A Prospective Study at JSS Hospital, India”. International Surgery Journal, vol. 4, no. 1, Dec. 2016, pp. 103-6, doi:10.18203/2349-2902.isj20164050.