Hari, Yoshiyuki; Obika, Satoshi; Sakaki, Minako; Morio, Ken-Ichiro; Yamagata, Yuriko; Imanishi, Takeshi Tetrahedron, 2002, vol. 58, # 15 p. 3051 - 3063 doi: 10.1016/S0040-4020(02)00226-0