Burgos Videla C, Oña Macías A, Castillo Rojas W. Analysis and implementation of free education at the University of Atacama. ijeri [Internet]. 2020 Jul. 9 [cited 2025 Jul. 4];(14):1-16. Available from: https://www.upo.es/revistas/index.php/IJERI/article/view/4483