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@article{JRAM_1987__377_152923, author = {Nicholas M. Katz}, title = {On a certain class of exponential sums.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {12--17}, publisher = {mathdoc}, volume = {377}, year = {1987}, zbl = {0604.12015}, url = {http://geodesic.mathdoc.fr/item/JRAM_1987__377_152923/} }
Nicholas M. Katz. On a certain class of exponential sums.. Journal für die reine und angewandte Mathematik, Tome 377 (1987), pp. 12-17. http://geodesic.mathdoc.fr/item/JRAM_1987__377_152923/