OTTO, Karl-Heinz; TOULKERIDIS, Theofilos; ZACH, Imme; EDLER, Dennis. An Empirical Study on Pupils’ Knowledge on Active Volcanoes and Protective Measures in Ecuador. Journal of Geography Education, [S. l.], v. 47, n. 1, p. 1–23, 2019. DOI: 10.18452/19953. Disponível em: https://zgd-journal.de/index.php/zgd/article/view/7. Acesso em: 2 apr. 2026.