参考文献

Woodward, Robert Burns; Ayer, William A.; Beaton, John M.; Bickelhaupt, Friedrich; Bonnett, Raymond; Buchschacher, Paul; Closs, Gerhard L.; Dutler, Hans; Hannah, John; Hauck, Fred P.; Ito, Sho; Langemann, Albert; Le Goff, Eugene; Leimgruber, Willy; Lwowski, Walter; Sauer, Juergen; Valenta, Zdenek; Volz, Heinrich Tetrahedron, 1990 , vol. 46, # 22 p. 7599 - 7659