1. M. P. MENON, J. Radioanal. Chem., 43 (1978) 309.
2. L. G. SILLÉN, A. E. MARTELL, Stability Constants of Metal Ion Complexes, Spec. Publ. 25 (Suppl. 1), The Chemical Society, Burlington House WIV, London, 1971.
3. L. G. SILLÉN, A. E. MARTELL, Stability Constants of Metal-Ion Complexes, Spec. Publ. 17, The Chemical Society, Burlington House WIV, London, 1964.
4. E. B. SANDELL, Colorimetric Determination of Traces of Metals, Interscience Publ. Ltd., New York, 1959, p. 410, 555–583.
5. M. SAIKI, M. J. C. NASTASI, F. W. LIMA, J. Radioanal. Chem., 64 (1981) 83.