NIELSEN, J. A Virtual Protocol Model for Computer-Human Interaction. DAIMI Report Series, [S. l.], v. 13, n. 178, 1984. DOI: 10.7146/dpb.v13i178.7453. Disponível em: https://tidsskrift.dk/daimipb/article/view/7453. Acesso em: 8 may. 2024.