Hanaya, Tadashi; Akamatsu, Akihito; Kawamoto, Heizan; Armour, Margaret-Ann; Hogg, Alan M.; Yamamoto, Hiroshi Bulletin of the Chemical Society of Japan, 1991, vol. 64, # 8 p. 2398 - 2401 doi: 10.1246/bcsj.64.2398