WITTLICH, Christian; WAHL, Pia; SCHULT, Bente. Non-formal and Out-of-School Education for Sustainable Development: A Systematic Literature Review. Journal of Geography Education, [S. l.], v. 52, p. 47–69, 2024. DOI: 10.60511/52193. Disponível em: https://zgd-journal.de/index.php/zgd/article/view/193. Acesso em: 2 apr. 2026.