@article{JRAM_1909__135_149303,
     author = {L.E. Dickson},
     title = {Lower limit for the number of sets of solutions of xe + ye + ze ... 0 (mod p).},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {181--188},
     publisher = {mathdoc},
     volume = {135},
     year = {1909},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1909__135_149303/}
}