KOLENC KOLNIK, Karmen. Proactivity and fieldwork in education for sustainable development. Journal for Geography, [S. l.], v. 2, n. 2, p. 21–28, 2007. DOI: 10.18690/rg.2.2.2906. Disponível em: https://old.journals.um.si/index.php/geography/article/view/2906. Acesso em: 8 nov. 2025.