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@article{JRAM_1977__292_151883, author = {Wells Johnson}, title = {On the nonvanishing of {Fermat} quotients (mod p).}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {196--200}, publisher = {mathdoc}, volume = {292}, year = {1977}, zbl = {0347.10001}, url = {http://geodesic.mathdoc.fr/item/JRAM_1977__292_151883/} }
Wells Johnson. On the nonvanishing of Fermat quotients (mod p).. Journal für die reine und angewandte Mathematik, Tome 292 (1977), pp. 196-200. http://geodesic.mathdoc.fr/item/JRAM_1977__292_151883/