1. Harris, L. A., and Olcott, H. S., J. Amer. Oil Chem. Soc., 43, 11 (1966).
2. Wolfenstein, R., Chem. Ber., 25, 2777 (1892).
3. Blout, E. R., Cohen, S. G., and Green, M., US Patent 2,843,481, July 15, 1958.
4. Coppinger, G. M., and Swalen, J. D., J. Amer. Chem. Soc., 83, 4900 (1961).
5. Chapelet-Letourneurx, G., Lemaire, H., and Rassat, A., Bull. Soc. Chim., 3283 (1965).