1. H. P. Yule, V. P. Guinn, in Radiochemical Methods of Analysis, Vol. II, 111, IAEA, Vienna, 1965.
2. F. Adams, J. Hoste, Atomic Energy Review, Vol. IV, No. 2, 113, IAEA, Vienna, 1966.
3. H. R. Lukens, J. K. McKenzie Trans. Am. Nucl. Soc., 10 (1967) 85.
4. H. R. Lukens,J. Radional. Chem., 1 (1968) 349.
5. L. Kaplan, K. E. Wilzbach,Anal. Chem., 26 (1954) 1797.