HANSEN, T. I. The quality of quality: Toward a semiotics of quality in learning materials. Learning Tech, [S. l.], v. 5, n. 8, p. 40–61, 2020. DOI: 10.7146/lt.v5i8.120896. Disponível em: https://tidsskrift.dk/learningtech/article/view/120896. Acesso em: 24 apr. 2024.