1. W. Preetz and E. Blasius,Z. Anorg. Chem., 332, 190 (1964).
2. M. T. Beck,Chemistry of Complex Equilibria, Van Nostrand Reinhold Co., London, 1970.
3. L. G. Sillen and A. E. Martell,Stability Constants, Chem. Soc. Spec. Publ., London, Nr. 17 (1964);
4. D. D. Perrin,Stability Constants, Organic Ligands, IUPAC Chemical Data Ser. Nr. 22, Pergamon, Oxford, 1979.
5. P. M. May, P. W. Linder and D. R. Williams,J. Chem. Soc. Dalton Trans., 588 (1977).