Hemmer, Ingrid, Marie Döpke, Christoph Koch, and Anna Peitz. “How Effective Is ESD Training for University Lecturers?”. Journal of Geography Education 50, no. 4 (May 8, 2023): 182–199. Accessed April 2, 2026. https://zgd-journal.de/index.php/zgd/article/view/87.