HYNEK, A.; SVOZIL, B.; TRÁVNÍČEK, J.; TROJAN, J. Sustainable Deblín Region: Educational Project. Envigogika, Praha, Czech Republic, v. 4, n. 2, 2009. DOI: 10.14712/18023061.40. Disponível em: https://envigogika.cuni.cz/index.php/Envigogika/article/view/40. Acesso em: 21 sep. 2020.