Hellberg-Rode G, Schrüfer G, Hemmer M. Do Teachers Require Specific Skills to Implement Education for Sustainable Development (ESD)? Theoretical Framework, Study Design, and First Results. ZGD [Internet]. 2014 Dec. 31 [cited 2026 Apr. 2];42(4):257-81. Available from: https://zgd-journal.de/index.php/zgd/article/view/120