Ohshima, Takashi; Gnanadesikan, Vijay; Shibuguchi, Tomoyuki; Fukuta, Yuhei; Nemoto, Tetsuhiro; Shibasaki, Masakatsu Journal of the American Chemical Society, 2003, vol. 125, # 37 p. 11206 - 11207 doi: 10.1021/ja037290e