DLOUHÁ, J. Environmental education – an attempt at a systemic identification of the problem. Envigogika, Praha, Czech Republic, v. 1, n. 1, 2006. DOI: 10.14712/18023061.7. Disponível em: https://envigogika.czp.cuni.cz/index.php/Envigogika/article/view/7. Acesso em: 22 oct. 2020.