SCHMALOR, Hannes. Nachruf auf Herrn Prof. Dr. Karl-Heinz Otto. Journal of Geography Education, [S. l.], v. 54, p. 63–64, 2026. DOI: 10.60511/54525. Disponível em: https://zgd-journal.de/index.php/zgd/article/view/525. Acesso em: 19 jul. 2026.