Shchel'tsyn, V. K.; Vinnik, M. I. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1982 , vol. 31, # 1 p. 64 - 71 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1982 , # 1 p. 72 - 80