Chiche Medrano was an artist who worked under the pen name A. Martinez. His work appeared briefly in Fierro, some of the magazines published by Editorial Columba (El Tony, D'Artganan, Fantasía), and many of the magazines published by Ediciones Record (Tit-Bits, Pif Paf, Gunga Din). He also did tons of works for British and German publishers, most of them uncredited. He also worked as an agent for other artists. Several of his assistants turned out to become prominent artists, such as Carlos Pedrazzini and Quique Alcatena, among others.