OKPALA, A. E.; SALEH, A. G. Distance Education and the Challenges Faced by Libraries and the Way Forward. West African Journal of Open and Flexible Learning, [S. l.], v. 9, n. 1, p. 79–102, 2020. Disponível em: https://wajofel.org/index.php/wajofel/article/view/63. Acesso em: 3 may. 2024.