1. Abel, E. W. andNickless, G., Proc. Chem. Soc., 1960, 288.
2. Matsuda, H. andMatsuda, Ts., J. Chem. Soc. Japan,63 (1960).
3. Franc, I., Wurst, M. andMoudry, V., Coll. Czech. Chem. Commun.26, 1313 (1961).
4. Brazhnikov, C. V., Makhina, A. A., Sakodinski, K. I., Gasovaya Chromatographia, Niitechim pub., Moscow 1967, No. 7. p. 106.
5. Bortnikov, G. N., Vyasankin, N. S., Gladyshev, E. N. andAndreevichev, V. S., Zavodskaya Laboratoria,12, 1445 (1969).