3) Aggarwal, S., Jajaram, G., Kakar, A., et al.: Fine needle aspiration cytologic diagnosis of the solitary cold thyroid nodule: Comparison with ultrasonography, radionucleide perfussion study and xeroradiography, Acta Cytol., 33: 41-47, 1989.
4) Jones, A.J., Aitman, T.J., Edmonds, C.J., et al.: Comparison of fine needle aspiration cytology, radioisotopic and ultrasound scanning in the management of thyroid nodules, Postgrad. Med. J., 66: 914-917, 1990.
5) Wafters, D.A., Ahuja, A.T., Evans, R.M., et al.: Role of ultrasound in the management of thyroid nodules, Am. J. Surgery, 4: 654-657, 1992.