HODEL, H.-P.; INEICHEN, L. A. Toc-toc – Bonjour, canon. Babylonia Journal of Language Education, [S. l.], v. 3, p. 46–49, 2017. DOI: 10.55393/babylonia.v3i.494. Disponível em: https://babylonia.online/index.php/babylonia/article/view/494. Acesso em: 28 apr. 2026.