HERNANDEZ DELGADO, M. J.; PÉREZ PÉREZ, A.; ORELLANA, A. Three-dimensional matrix for an approximation to quality assurance in distance education. EDUCARE Journal - UPEL-IPB - Second New Stage, [S. l.], v. 11, n. 2, 2007. Disponível em: https://www.revistas.investigacion-upelipb.com/index.php/educare/article/view/325. Acesso em: 9 nov. 2026.