Ishmuratov, G. Yu.; Balezina, G. G.; Odinokov, V. N.; Zelenova, L. M.; Tolstikov, G. A. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1983 , vol. 32, # 3 p. 609 - 610 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1983 , # 3 p. 671 - 672