Kita, Yasuyuki; Tohma, Hirofumi; Hatanaka, Kenji; Takada, Takeshi; Fujita, Shigekazu; Mitoh, Shizue; Sakurai, Hiromu; Oka, Shigenori Journal of the American Chemical Society, 1994 , vol. 116, # 9 p. 3684 - 3691