JOURNAL SYSTEM. 0 - Prelim. Africa Development, [S. l.], v. 19, n. 3, 1994. DOI: 10.57054/ad.v19i3.2579. Disponível em: https://www.journals.codesria.org/index.php/ad/article/view/2579. Acesso em: 7 aug. 2025.