Yamamoto, Hiroshi; Hara, Atsushi; Noguchi, Ayashi; Kawamoto, Heizan; Inokawa, Saburo; Nozoe, Tetsuo Bulletin of the Chemical Society of Japan, 1982, vol. 55, # 5 p. 1594 - 1598 doi: 10.1246/bcsj.55.1594