@article{10_4064_aa149_2_5,
     author = {A. Schinzel},
     title = {Primitive roots and quadratic non-residues},
     journal = {Acta Arithmetica},
     pages = {161--170},
     publisher = {mathdoc},
     volume = {149},
     number = {2},
     year = {2011},
     doi = {10.4064/aa149-2-5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa149-2-5/}
}