Nakata, Masaya; Takao, Hideaki; Ikeyama, Yutaka; Sakai, Toshiya; Tatsuta, Kuniaki; Kinoshita, Mitsuhiro Bulletin of the Chemical Society of Japan, 1981, vol. 54, # 6 p. 1749 - 1756 doi: 10.1246/bcsj.54.1749