1. Chemistry of the Elements;Greenwood,1984
2. Advanced Inorganic Chemistry;Cotton,1988
3. (a) A. Martell, L.G. Sillén, Stability Constants of Metal-Ion Complexes, Special Publication no. 17, The Chemical Society, London, 1964.
4. (b) A. Martell, L.G. Sillén, Stability Constants of Metal-Ion Complexes, Special Publication no. 25, The Chemical Society, London, 1971.
5. (c) E. Högfeldt, Stability Constants of Metal-Ion Complexes, Part A: Inorganic Ligands, Pergamon, Oxford, 1982.