JOURNAL SYSTEM. 0 - Prelim. Africa Development, [S. l.], v. 19, n. 4, 1994. DOI: 10.57054/ad.v19i4.2566. Disponível em: https://www.journals.codesria.org/index.php/ad/article/view/2566. Acesso em: 6 aug. 2025.