Ikonnikov,N.S.; Terent'ev,A.B.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1976 , vol. 25, # 12 p. 2622 - 2625
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1976 , vol. 25, # 12 p. 2813 - 2816