@article{10_4064_cm100_1_8, author = {Florian Luca and P. G. Walsh}, title = {On the number of nonquadratic residues which are not primitive roots}, journal = {Colloquium Mathematicum}, pages = {91--93}, publisher = {mathdoc}, volume = {100}, number = {1}, year = {2004}, doi = {10.4064/cm100-1-8}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/cm100-1-8/} }