Wang, Ying-Chuan; Lu, Tzung-Min; Elango, Shanmugham; Lin, Chao-Kuo; Tsai, Chia-Tzung; Yan, Tu-Hsin Tetrahedron Asymmetry, 2002, vol. 13, # 7 p. 691 - 695 doi: 10.1016/S0957-4166(02)00192-1