Schmidt, Andreas; Mordhorst, Thorsten
Synthesis, 2005 , # 5 art. no. T09804SS, p. 781 - 786

Sipyagin, A. M.; Pal'tsun, S. V.; Pomytkin, I. A.; Aleinikov, N. N.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1994 , vol. 30, # 1 p. 56 - 59
Khimiya Geterotsiklicheskikh Soedinenii, 1994 , # 1 p. 63 - 67

Sipyagin, A. M.; Pal'tsun, S. V.; Pomytkin, I. A.; Aleinikov, N. N.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1994 , vol. 30, # 1 p. 56 - 59
Khimiya Geterotsiklicheskikh Soedinenii, 1994 , # 1 p. 63 - 67

Wakefield, Basil J.; Whitten, Jeffrey P.; Farley, Paul S.
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1982 , p. 93 - 100