Environmental education at school: a project developed in the state of Paraná. Olhar de Professor, [S. l.], v. 13, n. 1, p. 171–184, 2011. DOI: 10.5212/OlharProfr.v.13i1.0011. Disponível em: https://revistas.uepg.br/index.php/olhardeprofessor/article/view/3199. Acesso em: 21 may. 2026.