1. A. E. Martell and M. M. Taquikhan,Homogeneous Catalysis by Metal Complexes, Vol. II, Academic Press, New York, 1978.
2. H. Sigel,Metal Ions in Biological Systems, Vol. 13, Marcel Dekker, New York, 1981.
3. D. N. Hendrickson,Magneto Structural Correlations in Exchange Coupled Systems, R. D. Willett, D. Gatteschi and O. Kahn; NATO ASI Ser.; D. Reidel Publ. Co., 1985 pp. 523?594 and refs. therein.
4. T. R. Felthouse, E. J. Laskowski and D. N. Hendrickson,Inorg. Chem.,16, 1077 (1977).
5. C. G. Pierpont, L. C. Francesconi and D. N. Hendrickson,Inorg. Chem.,16, 2367 (1977).