Ogibin, Yu. N.; Velibekova, D. S.; Katsin, M. I.; Troyanskii, E. I.; Nikishin, G. I.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1981 , vol. 30, # 8 p. 1511 - 1515
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1981 , vol. 30, # 8 p. 1842 - 1846