DEMERS, Marthe. La didactique des sciences par contrat. Canadian Journal of Education/Revue canadienne de l’éducation, [S. l.], v. 3, n. 2, p. 27–41, 1978. Disponível em: https://cje.journals.publicknowledgeproject.org/index.php/cje-rce/article/view/8012. Acesso em: 19 sep. 2026.