1. M. A. Yurovskaya, A. V. Karchava, A. Z. Afanas'ev, and Yu. G. Bundel', Khim. Geterotsikl. Soedin., No. 4, 489 (1992).
2. M. A. Yurovskaya, M. Bkhaumik, and Yu. G. Bundel', Vestn. Mosk. Gos. Univ., Ser. Khim., 26, 490 (1985).
3. M. A. Yurovskaya, A. Z. Afanas'ev, É. M. Gizatullina, and Yu. G. Bundel', Khim. Geterotsikl. Soedin., No. 12, 1625 (1987).
4. H. Quast and A. Heulein, Chem. Ber., 108, 2574 (1975).
5. K. Burger, Solvation: Ionic Reactions and Complex Formation in Non-Aqueous Solvents, Elsevier, New York (1984).