Kul'nevich, V. G.; Solonenko, L. A.; Zhuravlev, S. V.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1983 , vol. 19, # 5 p. 474 - 478
Khimiya Geterotsiklicheskikh Soedinenii, 1983 , vol. 19, # 5 p. 592 - 596
McKeown, Neil B.; Chambrier, Isabelle; Cook, Michael J.
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1990 , # 4 p. 1169 - 1177