Bukharov,V.G.; Pozdnyakova,T.E.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1960 , # 6 p. 1031 - 1035
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1960 , # 6 p. 1108 - 1113
Sedavkina, V. A.; Morozova, N. A.; Egorova, A. Yu.; Ostroumov, I. G.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1987 , vol. 23, # 4 p. 377 - 380
Khimiya Geterotsiklicheskikh Soedinenii, 1987 , # 4 p. 451 - 454