Exponential sums on (Gm)n.
Twisted exponential sums and Newton polyhedra.
On the degree of the -function associated with an exponential sum
On twisted exponential sums.
Differential modules defined by systems of equations
Character sums in finite fields
On the -adic continuation of the logarithmic derivative of certain hypergeometric functions
On the zeta function of a complete intersection
-adic estimates for exponential sums and the theorem of Chevalley-Warning
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