1. Yu. N. Kukushkin, V. V. Sibirskaya, T. K. Mikhal'chenko, L. V. Konovalov, Yu. V. Fadeev and O. I. Arkhangel'skaya, Zh. Obshch. Khim., 44, 1912 (1974);
2. Chem. Abstr., 81, 144842w (1974).
3. Yu. N. Kukushkin, V. V. Sibirskaya, T. K. Mikhal'chenko and L. V. Konovalov, Zh. Obshch. Khim., 45, 1584 (1975);
4. Chem. Abstr., 83, 157114b (1975).
5. J.-M. Bret, P. Castan and J. P. Laurent, Transition Met. Chem., 8, 218 (1983).