Fernández Fernández S, Woitschach PR, Alvarez-Díaz M, Fernández Alonso R. Analysis of the opportunity to learn in the TERCE study of UNESCO. Rev. invest. educ. [Internet]. 2018 Jun. 25 [cited 2024 Jul. 17];36(2):509-28. Available from: https://revistas.um.es/rie/article/view/307831