BAGOLY-SIMÓ, Péter; HEMMER, Ingrid. IN EIGENER SACHE: ZGD jetzt digital und open access!. Journal of Geography Education, [S. l.], v. 47, n. 1, 2019. DOI: 10.18452/20080. Disponível em: https://zgd-journal.de/index.php/zgd/article/view/8. Acesso em: 2 apr. 2026.