@article{1077465588, author = {Ankeny, N. C.}, title = {Quadratic residues}, journal = {Duke Math. J.}, volume = {21}, number = {1}, year = {1954}, pages = { 107-112}, language = {en}, url = {http://dml.mathdoc.fr/item/1077465588} }
Ankeny, N. C. Quadratic residues. Duke Math. J., Tome 21 (1954) no. 1, pp. 107-112. http://gdmltest.u-ga.fr/item/1077465588/