SAMMOUR, George Nicola. Elearning Systems Based on the Semantic Web. International Journal of Emerging Technologies in Learning (iJET), [S. l.], v. 1, n. 1, 2006. DOI: 10.3991/ijet.v1i1.2. Disponível em: https://online-journals.org/index.php/i-jet/article/view/2. Acesso em: 6 may. 2024.