Andreeshchev, E. A.; Viktorova, V. S.; Kilin, S. F.; Kovyrzina, K. A.; Kosyakina, L. N.; at al.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1986 , vol. 22, # 11 p. 1262 - 1266
Khimiya Geterotsiklicheskikh Soedinenii, 1986 , vol. 22, # 11 p. 1557 - 1562

Hall, J. Herbert; Chien, Joseph Yuming; Kauffman, Joel M.; Litak, Peter T.; Adams, Jeffrey K.; et al.
Journal of Heterocyclic Chemistry, 1992 , vol. 29, # 5 p. 1245 - 1273

Andreeshchev, E. A.; Viktorova, V. S.; Kilin, S. F.; Kovyrzina, K. A.; Kosyakina, L. N.; at al.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1986 , vol. 22, # 11 p. 1262 - 1266
Khimiya Geterotsiklicheskikh Soedinenii, 1986 , vol. 22, # 11 p. 1557 - 1562