Sio, M. C. D., J. A. U. Uy, and R. G. Soriano. “Calcifications in Thyroid Ultrasonography and Thyroid Carcinoma”. Philippine Journal of Otolaryngology Head and Neck Surgery, vol. 29, no. 2, Dec. 2014, pp. 15-18, doi:10.32412/pjohns.v29i2.413.