Nikishin,G.I. et al.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1975 , vol. 24, p. 2387 - 2391
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1975 , vol. 24, p. 2501 - 2505

Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), , vol. 24, p. 2387 - 2391
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, , vol. 24, p. 2501 - 2505