Sureda-Negre J, Catalán-Fernández A, Álvarez-García O, Comas-Forgas R. The concept of "sustainable development" in the curriculum regulation of Secondary Education in Spain. EPED [Internet]. 2018 May 18 [cited 2024 Jul. 18];39(1):253-67. Available from: http://revistas.uach.cl/index.php/estped/article/view/2619