Volkov, V. V.; Myakishev, K. G.; Dunaev, S. T.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1988 , vol. 37, p. 2234 - 2236
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1988 , vol. 37, p. 2481 - 2484