Anisimov, A.V.; Panov, S. M.; Egorov, A. M.; Viktorova, E. A.
Journal of Organic Chemistry USSR (English Translation), 1984 , vol. 20, p. 367 - 369
Zhurnal Organicheskoi Khimii, 1984 , vol. 20, # 2 p. 408 - 411
Chemistry of Heterocyclic Compounds (New York, NY, United States), , vol. 27, # 10 p. 1049 - 1052
Khimiya Geterotsiklicheskikh Soedinenii, , vol. 27, # 10 p. 1312 - 1316