@article{1077375924, author = {Whyburn, Clifton T.}, title = {The second smallest quadratic non-residue}, journal = {Duke Math. J.}, volume = {32}, number = {1}, year = {1965}, pages = { 519-528}, language = {en}, url = {http://dml.mathdoc.fr/item/1077375924} }
Whyburn, Clifton T. The second smallest quadratic non-residue. Duke Math. J., Tome 32 (1965) no. 1, pp. 519-528. http://gdmltest.u-ga.fr/item/1077375924/