ARAGÓN AGUILAR, Tatiana Karina. Competencies and challenges of UNICAES professors in the design of virtual learning environments and resources. Anuario de Investigación: Universidad Católica de El Salvador, [S. l.], v. 11, n. 1, p. 65–77, 2022. DOI: 10.5377/aiunicaes.v11i1.15166. Disponível em: https://www.camjol.info/index.php/aiunicaes/article/view/15166. Acesso em: 8 dec. 2025.