1. Allen, A. A., Duffner, C. R., Kurzer, F. Tetrahedron34, 1247 (1978).
2. International Union of Pure and Applied Chemistry. J. Amer. Chem. Soc.82, 5545 (1960);
3. Nomenclature of Organic Chemistry. 3rd Edition, pp. 31, 35. London: Butterworth. 1971.
4. Chem. Abstracts, Index Guide, Vol. 76?85 (1972?1976); Chemical Abstract Service, Columbus, pp. 1171 et seq (1977).
5. West, W., Matsen, F. A., Becker, R. S., Scott, D. R., Chemical Applications of Spectroscopy (Weissberger, A., West, W., eds.), Part I, 2nd Edition, pp. 63, 267, 358 et seq. New York: Interscience Publishers. 1968; and references given therein.