ČINČERA, J. Development of investigation skills of elementary school pupils: experience from evaluation of a programme on Jizera mountains. Envigogika, Praha, Czech Republic, v. 6, n. 3, 2011. DOI: 10.14712/18023061.63. Disponível em: https://www.envigogika.cuni.cz/index.php/Envigogika/article/view/63. Acesso em: 21 oct. 2020.