Arbusov, V. A.; Klimovitskii, E. N.; Timirbaev, M. B. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1983 , vol. 32, # 8 p. 1611 - 1615 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1983 , # 8 p. 1781 - 1785