Pukhnarevich, V. B.; Ushakova, N. I.; Adamovich, S. N.; Tsykhanskaya, I. I.; Varshavskii, Yu. S.; Voronkov, M. G. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1985 , vol. 34, # 11 p. 2400 - 2404 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1985 , # 11 p. 2589 - 2594