Kurasov, L. A.; Posharskii, A. F.; Kuz'menko, V. V.
Journal of Organic Chemistry USSR (English Translation), 1981 , vol. 17, p. 1735 - 1738
Zhurnal Organicheskoi Khimii, 1981 , vol. 17, p. 1944 - 1947

Pozharskii, A.F.; Tsarevskaya, E.V.; Rudnev, M.I.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1988 , p. 678 - 681
Khimiya Geterotsiklicheskikh Soedinenii, 1988 , vol. 24, # 6 p. 827 - 830

Barth, Thomas; Neugebauer, Franz A.
Journal of Organic Chemistry, 1995 , vol. 60, # 17 p. 5401 - 5406

Konstantinchenko, A. A.; Pozharskii, A. A,; Stepanova, V. N.
Russian Journal of Organic Chemistry, 1993 , vol. 29, # 7.2 p. 1195 - 1199
Zhurnal Organicheskoi Khimii, 1993 , vol. 29, # 7 p. 1437 - 1442