Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), , # 3 p. 428 - 435 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, , # 3 p. 461 - 468 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, , p. 243,245, 247; engl. Ausg. S. 233, 235, 236