VUORIKARI, Riina; KOPER, Rob. Evidence of Cross-boundary Use and Reuse of Digital Educational Resources. International Journal of Emerging Technologies in Learning (iJET), [S. l.], v. 4, n. 4, p. pp. 51–56, 2009. DOI: 10.3991/ijet.v4i4.1028. Disponível em: https://online-journals.org/index.php/i-jet/article/view/1028. Acesso em: 1 may. 2024.