Do you know any good reference on Weil bounds for character sums over algebraic curves?
I prefer references which assume little previous knowledge.



Weil bound for characters sums
Yes, check out Chapter 8 of this paper:


*Chen, Xi; Kayal, Neeraj; Wigderson, Avi*, [**Partial derivatives in arithmetic complexity and beyond**](https://doi.org/10.1561/0400000043), Found. Trends Theor. Comput. Sci. 6, No. 1–2, 1–138 (2010). [Zbl 1278.68010](https://zbmath.org/1278.68010). [PDF](https://www.math.ias.edu/%7Eavi/PUBLICATIONS/MYPAPERS/CKW11/CKW11.pdf)


