@Misc{FIL20130000725, title = "Working papers ", publisher = "Barcelona : Institut de Ci\`{e}ncies Pol\'{\i}tiques i Socials", editor = "Institut de Ci\`{e}ncies Pol\'{\i}tiques i Socials", URL = "http://www.larramendi.es/es/consulta/registro.do?id=9760", year = " ", }