@article{JRAM_1980__318_152267,
     author = {Kenneth S. Williams and Richard H. Hudson},
     title = {On the least quadratic non-residue of a prime p ... 3 (mod 4).},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {106--109},
     publisher = {mathdoc},
     volume = {318},
     year = {1980},
     zbl = {0425.10004},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1980__318_152267/}
}