1. Landolt-Börnstein, New Series Group II, vol. 13, H. Fischer, ed., W. de Gruyter, Berlin (1984)
2. For a review see: C. Walling, in “Free Radicals in Solution”, John Wiley and Sons Inc., New York, N. Y., 1957, pp. 313–326.
3. R.H. Pullen and C. Sivertz, Can. J. Chem. 35: 723, (1957).
4. C. Sivertz, J. Phys. Chem. 63: 34, (1959).
5. C. Walling and W. Helmreich, J. Am. Chem. Soc. 81: 1144 (1959).