@article{JRAM_1971__251_151152,
     author = {John Johnsen},
     title = {On the distribution of powers in finite fields.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {10--19},
     publisher = {mathdoc},
     volume = {251},
     year = {1971},
     zbl = {0237.10026},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1971__251_151152/}
}