Seebach, Dieter; Jaeschke, Georg; Gottwald, Konstanze; Matsuda, Keiji; Formisano, Roberto; Chaplin, David A.; Breuning, Matthias; Bringmann, Gerbard Tetrahedron, 1997, vol. 53, # 22 p. 7539 - 7556 doi: 10.1016/S0040-4020(97)00456-0