Vladimir Drinfeld, "Two-dimensional l-adic representations of the fundamental group of a curve over a finite field and automorphic forms on GL_2" (djvu)
Vladimir Drinfeld, "Two-dimensional l-adic representations of the Galois group of a global field of characteristic p and automorphic forms on GL2" (djvu)
Vladimir Drinfeld, "Varieties of modules of F-sheaves" (pdf) [at the old page]