Pure Appl. Chem., 1975, Vol. 44, No. 4, pp. 807-828
doi:10.1351/pac197544040807
Results of carbon-13 n.m.r. spectroscopy in the field of cyclic conjugated π-electron systems*
H. Günther and H. Schmickler
*Second International Symposium on the Chemistry of Nonbenzenoid Aromatic Compounds, Lindau/Bodensee, GFR, 23-27 September 1974