Hara, Shoji; Hatakeyama, Tsuyoshi; Chen, Sheng-Qi; Ishi-I, Kenji; Yoshida, Masanori; Sawaguchi, Masanori; Fukuhara, Tsuyoshi; Yoneda, Norihiko Journal of Fluorine Chemistry, 1998 , vol. 87, # 2 p. 189 - 192