SCHREURS, Jeanne; DALLE, Rik; SAMMOUR, George Nicola. Authoring Systems Delivering Reusable Learning Objects. International Journal of Emerging Technologies in Learning (iJET), [S. l.], v. 4, n. s2, p. pp. 37–42, 2009. DOI: 10.3991/ijet.v4is2.812. Disponível em: https://online-journals.org/index.php/i-jet/article/view/812. Acesso em: 3 may. 2026.