The approach of St"ohr-Voloch to the Hasse-Weil bound with applications to optimal curves and plane arcs
arXiv:math/0011091
Abstract
This is an expository paper concerning topics on rational points of curves defined over finite fields based on a paper by St"ohr and Voloch.
72 pages, LaTex2e, ps file available at http:// www.ime.unicamp.br/~ftorres