Makhova, N. N.; Petukhova, V. Yu.; Khmel'nitskii, L. I. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1982 , vol. 31, # 10 p. 2052 - 2056 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1982 , # 10 p. 2331 - 2335