1. R.W. Hay, Bioinoraanic Chemistry, Ellis Horwood, Chichester, 130, (1984).
2. M.C.R. Symons, Spectroscopic studies of the structure and reactivity of some sulphur centred radicals, in: Oxygen and Sulfur Radicals in Chemistry and Medicine, A. Breccia, M.A.J. Rodgers and G. Semerano, eds., Lo Scarabeo, Bologna (1986).
3. P.M. Harrison and R.J. Hoare, Metals in Biochemistry, Chapman and Hall, eds., 46, (1980).
4. M. Tamba, Reactivity of Oxygen and Oxygen radicals, in.: Oxygen and Sulfur Radicals in Chemistry and Medicine, A. Breccia, M.A.J. Rodgers and G. Semerano, eds., Lo Scarabeo, Bologna (1986).
5. L.S. Alexander and H.M. Goff, Chemical, Cancer and Cytochrome p-450, J. Chem. Educ. 59:179 (1980).