BOEHN, D.; HAMANN, B. APPROACHES TO SUSTAINABILITY EXAMPLES FROM GEOGRAPHY TEXTBOOK ANALYSIS IN GERMANY. European Journal of Geography, [S. l.], v. 2, n. 1, 2021. Disponível em: https://eurogeojournal.eu/index.php/egj/article/view/34. Acesso em: 16 apr. 2026.