Geodesic
Estimates for character sums in finite fields of order $p^2$ and $p^3$
Trudy Matematicheskogo Instituta imeni V.A. Steklova, Harmonic analysis, approximation theory, and number theory, Tome 303 (2018), pp. 45-58.

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We obtain nontrivial bounds on character sums over “boxes” of volume $p^{n(1/4+\varepsilon)}$ in finite fields of order $p^n$ for $n=2$ and $n=3$. 
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     title = {Estimates for character sums in finite fields of order $p^2$ and $p^3$},
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M. R. Gabdullin. Estimates for character sums in finite fields of order $p^2$ and $p^3$. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Harmonic analysis, approximation theory, and number theory, Tome 303 (2018), pp. 45-58. http://geodesic.mathdoc.fr/item/TM_2018_303_a4/

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