OLŠOVSKÝ, J. The topology of being, nature conservation and our position on Earth. Envigogika, Praha, Czech Republic, v. 7, n. 2, 2012. DOI: 10.14712/18023061.315. Disponível em: https://www.envigogika.cuni.cz/index.php/Envigogika/article/view/315. Acesso em: 21 oct. 2020.