1. F. H. Moser and A. L. Thomas, Phthalocyanine Compounds, Reinhold Publishing Corp., New York (1963).
2. F. H. Moser and A. L. Thomas, J. Chem. Ed. 41, 245 (1964).
3. A. B. P. Lever, Adv. Inorg. Radiochem 7, 28 (1965).
4. D. D. Ledson and M. V. Twigg, Inorg. Chim. Acta 13, 43 (1975).
5. V. W. Day, T. J. Marks, and W. A. Wachter, J. Am. Chem. Soc 97, 4519 (1975).