Dwork’s Splitting -Rational of Zeta functions, p-adic cohomology

Computing zeta functions of nondegenerate hypersurfaces with few monomials (Steven Sperber and John Voight): https://math.dartmouth.edu/~jvoight/articles/sparse-dwork-092813.pdf

Notices of the AMS- Bernard Dwork : http://youngp.people.cofc.edu/mem-dwork.pdf