NEČAS, J. Rybníček Kaprníček. Envigogika, Praha, Czech Republic, v. 7, n. 1, 2012. DOI: 10.14712/18023061.354. Disponível em: https://www.envigogika.cuni.cz/index.php/Envigogika/article/view/354. Acesso em: 5 čvc. 2022.