@article{GDZPPN002179415, title = {A different with an odd class.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, volume = {211}, year = {1962}, pages = {6-7}, zbl = {0105.02903}, url = {http://dml.mathdoc.fr/item/GDZPPN002179415} }
Fröhlich, A.; Tate, J.; Serre, J.-P. A different with an odd class.. Journal für die reine und angewandte Mathematik, Tome 211 (1962) pp. 6-7. http://gdmltest.u-ga.fr/item/GDZPPN002179415/