Felipe Voloch
Note: I have moved.
Scans of some old papers

Diagonal equations over function fields. Bol. Soc. Brasil. Mat.
16(1985), 2939.
 (with K.O. Stohr)
Weierstrass points and curves over finite fields.
Proc. London Math. Soc. (30) 52(1986), 119.
 (with A. Garcia)
Fermat curves over finite fields J. Number Theory 30 (1988), 345356.

Geometry of Space Curves Proc. of the 10th School of Algebra, Vitoria,
Brazil, 1989. pp 121122. SBM, Rio de Janeiro 1990.

On the number of values taken by a polynomial over a finite field.
Acta Arithmetica LII(1989), 197201.

Public Announcement.
American Mathematical Monthly Oct. 2005 pg 681.

Arcs projective planes over prime fields. J. Geometry 38 (1990), 198200.

Complete arcs in Galois planes of nonsquare order,
in Advances in Finite Geometries and Designs, J. Hirschfeld, D. Hughes and J. Thas, eds.,
Oxford University Press, 1991, pp.401406.