Kasatkin, A.N.; Biktimirov, R.Kh.; Kulak, A.N.; Tolstikov, G.A.
Journal of Organic Chemistry USSR (English Translation), 1991 , vol. 27, # 4.1 p. 613 - 620
Zhurnal Organicheskoi Khimii, 1991 , vol. 27, # 4 p. 712 - 722

Nigmatov, A. G.; Serebryakov, E. P.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1991 , vol. 40, # 5.1 p. 961 - 970
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1991 , # 5 p. 1079 - 1088