OLŠOVSKÝ, J. Turn to the call of nature. Envigogika, Praha, Czech Republic, v. 7, n. 1, 2012. DOI: 10.14712/18023061.312. Disponível em: https://www.envigogika.cuni.cz/index.php/Envigogika/article/view/312. Acesso em: 29 oct. 2020.