Milcent, Rene; Nguyen, Thu-Huong
Journal of Heterocyclic Chemistry, 1986 , vol. 23, # 3 p. 881 - 883

Ram, Ram N.; Varsha, Kiran
Tetrahedron Letters, 1991 , vol. 32, # 41 p. 5829 - 5832

Alekseeva, V. Ya.; Boitkov, Yu. A.; Viktorovskii, I. V.; V'yunov, K. A.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1986 , vol. 22, # 11 p. 1258 - 1261
Khimiya Geterotsiklicheskikh Soedinenii, 1986 , vol. 22, # 11 p. 1553 - 1556