Shapiro, E. A.; Protopopova, M. N.; Nefedov, O. M.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1984 , vol. 33, p. 1968
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1984 , # 9 p. 2153

Shapiro, E. A.; Protopopova, M. N.; Nefedov, O. M.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1988 , vol. 37, p. 683 - 688
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1988 , # 4 p. 800 - 806