Kharchenko, V. G.; Chalaya, S. N.; Litvinov, O. V.; Yudovich, L. M.; Promonenkov, V. K.
Journal of Organic Chemistry USSR (English Translation), 1984 , vol. 20, # 6 p. 1098 - 1101
Zhurnal Organicheskoi Khimii, 1984 , vol. 20, # 6 p. 1208 - 1212

Kharchenko, V. G.; Promonenkov, V. K.; Chalaya, S. N.; Lisina, S. N.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1983 , vol. 19, # 12 p. 1342
Khimiya Geterotsiklicheskikh Soedinenii, 1983 , vol. 19, # 12 p. 1691 - 1692