1. Hodgson, D. J., in Prog. Inorg. Chem., Vol. 23, ed. S. J. Lippard. John Wiley and Sons, New York, 1977, p. 211.
2. Tu, A. T. and Heller, M. J., in Metal Ions in Biological Systems, Vol. 1, ed. H. Sigel. Marcel Dekker, New York, 1974, p. 1.
3. Aoki, K., in Metal Ions in Biological Systems, Vol. 32, ed. H. Sigel. Marcel Dekker, New York, 1996, p. 91.
4. Terrón, A., Comm. Inorg. Chem., 1993, 14, 63.
5. Adenine-Metal Complexes1,2