Bolstad T, Lundheim L, Strømberg A, Orlandic M, Zimmermann PH. Sustainability in project-based learning: Project themes and self-perceived competencies. NJSTEME [Internet]. 2021Feb.24 [cited 2025Apr.30];5(1). Available from: https://www.ntnu.no/ojs/index.php/njse/article/view/3925