1. Bauer, R. F., LaFlair, R. T., Russell, K. E.: Can. J. Chem. 48, 1251 (1970).
2. From Greek enioi = several, eidos = form or image; monoeidic = one form; dieidic = two forms.
3. Gandini, A., Plesch, P. H.: S. C. I. Monograph No. 20, p. 107, (1966).
4. Plesch, P. H.: Pure Appl. Chem. 12, 117 (1966).
5. Szwarc, M.: Carbanions, Living Polymers, and Electron-Transfer Processes: New York: Interscience 1968.