Baumann, Stefan, and Kai Niebert. “Education for Sustainable Development and Pedagogical Content Knowledge in Geography: Integration, Evolution or Revolution? First Results of a Qualitative Study of a Seminar Course”. Journal of Geography Education 50, no. 2 (January 25, 2023): 98–118. Accessed April 2, 2026. https://zgd-journal.de/index.php/zgd/article/view/137.