Xu, Xiaoliang; Ge, Zhichuang; Cheng, Dongping; Lei, Ma.; Lu, Chunshan; Zhang, Qunfeng; Yao, Nan; Li, Xiaonian
Organic Letters, 2010 , vol. 12, # 5 p. 897 - 899

Warren, Brent K.; Knaus, Edward E.
Journal of Heterocyclic Chemistry, 1987 , vol. 24, p. 1413 - 1416

Ahuja; Singh; Asthana; Sardana; Anand
Indian Journal of Chemistry - Section B Organic Chemistry Including Medicinal Chemistry, 1989 , vol. 28, # 12 p. 1034 - 1038