1. Rabin, B. R., “Metals and Enzyme Activity”, 21, edit. by Crook, E. M. (Cambridge University Press, 1958).
2. Klotz, I. M., and Loh Ming, W.-C., J. Amer. Chem. Soc., 76, 805 (1954).
3. Bello, J., and Vinograd, J. R., Nature, 181, 273 (1958).
4. Tschugaeff, L. A., Ber., 40, 1973 (1907).
5. Kober, P. A., and Suguira, K., J. Amer. Chem. Soc., 48, 383 (1912).