Imoto, Masahiro; Yoshimura, Hiroyuki; Shimamoto, Tetsuo; Sakaguchi, Nobuki; Kusumoto, Shoichi; Shiba, Tetsuo Bulletin of the Chemical Society of Japan, 1987, vol. 60, # 6 p. 2205 - 2214 doi: 10.1246/bcsj.60.2205