1. Ethylenimine and other aziridines’, Derner, O. C. and Ham, G. E., Academic Press, 1969; `Thiiranes’, Sander, M., Chem. Rev., 1966, 66, 297.
2. Stereochemistry of heterocyclic compounds’, Parts 1 and 2, Armarego, W. L. F., Wiley-Interscience, New York, 1977; `The conformational analysis of heterocyclic compounds’, Riddell, F. G., Academic Press, 1980.
3. Inada, A., Nakamaura, Y., and Morita, Y., Chem. Lett., 1980, 1287.
4. Introduction to the alkaloids. A biogenetic approach’, Cordell, G. A., WileyInterscience, 1981.
5. Matsumura, Y., Terauchi, J., Yamamoto, T., Konno, T., and Shono, T., Tetrahedron, 1993, 49, 8503.