1. D. D. Perrin,Stability Constants of Metal Ions Complexes. Organic Ligands, Pergamon, Oxford, 1979.
2. P. Amico, G. Arena, P. G. Daniele, G. Ostacoli, E. Rizzarelli and S. Sammartano,Mixed-Metal Complexes of Biofunctional Ligands: Formation, Stability and Possible Role in Model Systems with Metal Ion Overloads, in K. J. Irgolic and A. E. Martell Eds,Environmental Inorganic Chemistry, VCH Publishers, Inc., USA, 1985, p. 185.
3. P. Amico, G. Arena, P. G. Daniele, G. Ostacoli, E. Rizzarelli and S. Sammartano,Inorg. Chem.,20, 772 (1981);Idem, Inorg. Chim. Acta,35, L383 (1979).
4. P. G. Daniele, P. Amico and G. Ostacoli,Inorg. Chim. Acta,66, 65 (1982).
5. P. G. Daniele, P. Amico, G. Ostacoli and V. Zelano,Ann. Chim. (Rome),73, 199 (1983).