Celis-Galán, D.J. (2025) “Teaching Mathematics for Sustainable Development in Official Educational Institutions: Theoretical and Argumentative Contributions Based on the Key Competence of Problem Solving”, Nexus: Multidisciplinary Research Journal, 2(4), pp. 154–172. Available at: https://nexushouseeditorial.com/index.php/nexus/article/view/66 (Accessed: 25 March 2026).