An Algorithm to Compute Odd Orders and Ramification Indices of Cyclic Actions on Compact Surfaces. - Emilio Bujalance García; Antonio F. Costa; José Manuel Gamboa Mutuberría; Javier Lafuente López (Discret. Comput. Geom., 1994)

An Algorithm To Compute Orders and Ramification Indices of Cyclic Actions on Compact Surfaces, II. - Emilio Bujalance García; Antonio F. Costa; José Manuel Gamboa Mutuberría; Javier Lafuente López (Discret. Comput. Geom., 1996)

Counting the regular coverings of surfaces using the center of a group algebra. - Antonio F. Costa; S. M. Natanzon; A. M. Porto (Eur. J. Comb., 2006)

One-Dimensional Hurwitz Spaces, Modular Curves, and Real Forms of Belyi Meromorphic Functions. - Antonio F. Costa; Milagros Izquierdo; Gonzalo Riera (Int. J. Math. Math. Sci., 2008)

On automorphisms groups of cyclic p-gonal Riemann surfaces. - Gabriel Bartolini; Antonio F. Costa; Milagros Izquierdo (J. Symb. Comput., 2013)