Bubnov, Yu. N.; Gurskii, M. E.; Grandberg, A. I.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1987 , vol. 36, # 11 p. 2439 - 2441
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1987 , # 11 p. 2625 - 2627