1. Mixed-valence compounds of the early transition metals
2. Boas, L. V.; Pessoa, J. C. InComprehensive Coordination Chemistry; Wilkinson, G., Ed.; Pergamon: Oxford, U.K., 1987; Vol. 3, p 453.
3. Stankiewicz, P. J.; Tracey, A. S.; Crans, D. C. InMetal Ions in BiologicalSystems; Sigel, H., Sigel, A., Eds.; Marcel Dekker: New York, 1995; pp 287−324.