Boronkov, M. G.; Monkhoobor, D.; Baryshok, V. P.; Shirchin, B.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1986 , vol. 35, # 3 p. 634 - 636
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1986 , # 3 p. 693 - 695