HUBA, M. An Introduction to the Final Proceedings of the 10th Student Essay Competition on Sustainable Living. Envigogika, Praha, Czech Republic, v. 6, n. 3, 2011. DOI: 10.14712/18023061.165. DisponĂ­vel em: https://envigogika.cuni.cz/index.php/Envigogika/article/view/165. Acesso em: 29 nov. 2020.