Wang, Xiu Chun; Cui, Yu Xin; Mak, Thomas C. W.; Wong, Henry N. C.
Journal of the Chemical Society, Chemical Communications, 1990 , # 2 p. 167 - 169

Shiozawa; Ichikawa; Komuro; Kurashige; Miyazaki; Yamanaka; Sakamoto
Chemical and Pharmaceutical Bulletin, 1984 , vol. 32, # 7 p. 2522 - 2529