1. A. V. Kamernitskii, V. A. Krivoruchko, R. P. Litvinovskaya, and I. G. Reshetova, Izv. Akad. Nauk SSSR, Ser. Khim., 2073 (1975).
2. A. V. Kamernitskii, V. A. Krivoruchko, and I. G. Reshetova, Izv. Akad. Nauk SSSR, Ser. Khim., 108 (1978).
3. A. V. Kamernitskii, V. A. Krivoruchko, and I. G. Reshetova, Khim. Prir. Soedin., 208 (1980).
4. A. V. Kamernitskii, V. A. Krivoruchko, I. G. Reshetova, and E. I. Chernoburova, Khim. Prir. Soedin., 184 (1981).
5. W. S. Schwarz, Collect. Czech. Chem. Commun.,26, 1207 (1961).