1. Hargreaves M., McDougall R., Rabari L., Z. Naturforsch.336, 1535 (1978).
2. Mellor J. M., Ann. Rep. Chem. Soc.71 B, 382 (1974).
3. Jackmann L. M., Sternhell S., Nuclear Magnetic Resonance in Organic Chemistry, p. 288. Oxford: Pergamon. 1969.
4. Johnson F., Gurovitz W. D., Starkowsky N. A., J. Amer. Chem. Soc.87, 3492 (1965).
5. Kellie G. M., Riddell F. G., Nonchair Conformations of Six-membered Rings, in: Topics in Stereochemistry (Eliel E. L., Allinger N. L., eds.), Vol. 8, p. 225. New York: Wiley. 1974.