Zefirov, N. S.; Zhdankin, V. V.; Kozmin, A. S. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1983 , vol. 32, p. 1530 - 1531 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1983 , # 7 p. 1682