Yurtanov, A. I.; Naidovskii, E. S.; Belov, Yu. P.; Martynov, I. V.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1987 , vol. 36, p. 1076 - 1077
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1987 , vol. 36, # 5 p. 1162 - 1164

Yurtanov, A. I.; Yarkov, A. V.; Ignat'eva, T. I.; Zavel'skii, V. O.; Beznosko, B. K.; et al.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1988 , vol. 37, p. 2299 - 2306
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1988 , # 11 p. 2549 - 2556

Steinkopf
Justus Liebigs Annalen der Chemie, 1923 , vol. 434, p. 30