MADIBA, S. Environmental education and the teaching of mathematics in the primary school. Southern African Journal of Environmental Education, [S. l.], v. 4, p. 19, 1987. DOI: 10.4314/sajee.v4i0.137362. Disponível em: https://www.ajol.info/index.php/sajee/article/view/137362. Acesso em: 12 oct. 2026.