Singh; Bharty; Kushawaha; Butcher
Polyhedron, 2011 , vol. 30, # 12 p. 1927 - 1934

Uher, Michal; Bosansky, Milos; Kovac, Stefan; Martvon, Augustin
Collection of Czechoslovak Chemical Communications, 1980 , vol. 45, # 10 p. 2804 - 2807

Moskowitz, H.; Mignot, A.; Miocque, M.
Journal of Heterocyclic Chemistry, 1980 , vol. 17, # 9 p. 1321 - 1323