D. K. Sankhla, S. S. Hussein, H. Bererhi, O. El Shafie, N. J. Woodhouse, and V. Nirmala, “Are Scintigraphy and Ultrasonography Necessary Before Fine-Needle Aspiration Cytology for Thyroid Nodules?”, Sultan Qaboos Univ Med J, vol. 3, no. 1, pp. 29–33, Apr. 2001.