@article{JRAM_1984__350_152636,
     author = {Stephen D. Cohen},
     title = {Primitive roots and powers among values of polynomials over finite fields.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {137--151},
     publisher = {mathdoc},
     volume = {350},
     year = {1984},
     zbl = {0524.12012},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1984__350_152636/}
}