1. P. Beelen, A. Garcia, H. Stichtenoth, On ramification and genus of recursive towers, Portugaliae Math., to appear.
2. On towers of function fields of Artin–Schreier type;Beelen;Bulletin Braz. Math. Soc.,2004
3. A tower with non-Galois steps which attains the Drinfeld–Vladut bound;Bezerra;J. Number Theory,2004
4. J. Bezerra, A. Garcia, H. Stichtenoth, An explicit tower of function fields over cubic finite fields and Zink's lower bound, preprint, 2003.
5. The number of points of an algebraic curve;Drinfeld;Funktsional. Anal. i Prilozhen.,1983