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@article{PORMA_1955__14_1_114745, author = {Carlitz, L.}, title = {The number of solutions of a special quadratic congruence}, journal = {Portugaliae mathematica}, pages = {9--14}, publisher = {mathdoc}, volume = {14}, number = {1}, year = {1955}, mrnumber = {0073622}, zbl = {0065.27201}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1955__14_1_114745/} }
Carlitz, L. The number of solutions of a special quadratic congruence. Portugaliae mathematica, Tome 14 (1955) no. 1, pp. 9-14. http://geodesic.mathdoc.fr/item/PORMA_1955__14_1_114745/