1. G. H. MARRISON, H. FREISER, Solvent Extraction in Analytical Chemistry, Wiley Interscience, New York, 1957.
2. A. K. DE, S. M. KHOPHAR, R. A. CHARLMERS, Solvent Extraction of Metals, Van Nostrand Reinhold Co., London, 1970, p. 77.
3. A. W. ASHBROOK, Coord. Chem. Rev., 16 (1975) 285.
4. F. UMLAND, D. SCHUNEMANN, Angew. Chem., 70 (1958) 403.
5. K. MOTOJIMA, H. HASHITANI, Japan Analyst, 9 (1960) 151.