Pérez Martínez RM. Brief approach to the concept of functional illiteracy as a poor determination of a fundamental educational problem. IE Revista de Investigación Educativa de la REDIECH [Internet]. 2022Nov.29 [cited 2025Aug.21];13:e1442. Available from: https://www.rediech.org/ojs/2017/index.php/ie_rie_rediech/article/view/1442