Binary Kloosterman sums using Stickelberger's theorem and the Gross-Koblitz formula Faruk Göloğlu, Gary McGuire, Richard Moloney (2011) Acta Arithmetica
Bounds for exponential sums and their applications to pseudorandom numbers Jürgen Eichenauer-Herrmann, Harald Niederreiter (1994) Acta Arithmetica