Chemistry of Heterocyclic Compounds (New York, NY, United States), , vol. 27, # 10 p. 1140 - 1144
Khimiya Geterotsiklicheskikh Soedinenii, , vol. 27, # 10 p. 1414 - 1418
Knight, David W.; Nott, Andrew P.
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1983 , p. 791 - 794