Yang, Zhi-Cai; Jiang, Xiao-Bin; Wang, Zhi-Min; Zhou, Wei-Shan
Journal of the Chemical Society - Perkin Transactions 1, 1997 , # 3 p. 317 - 321

Schlessinger, Richard H.; Gillman, Kevin W.
Tetrahedron Letters, 1999 , vol. 40, # 7 p. 1257 - 1260