1. 1. B. de Benoit, M. Andersen, I. Egli, and B. Takkouche, “Iodine Status Worldwide, WHO Global Database on Iodine Deficiency”, ed. H. Allen, 2004, World Health Organization, Geneva, Switzerland, 9.
2. 2. “Trace Elements in Human Nutrition and Health”, 1996, World Health Organization, Geneva, Switzerland, 49.
3. 3. Y. Ishizuki, K. Yamauchi, and Y. Miura, Nippon Naibunpi Gakkai Zasshi, 1989, 65, 91.
4. 4. E. A. Crecellus, Anal. Chem., 1975, 47, 2034.
5. 5. P. W. F. Fischer, M. R. L’Abbe, and A. Giroux, J. Assoc. Off. Anal. Chem., 1986, 69, 687.