KEVIN, N.; FENG, L. J. The proliferation of informal sector activities in Congo: Case of the city of Brazzaville. JOURNAL OF SOCIAL SCIENCE RESEARCH, [S. l.], v. 11, n. 1, p. 2322–2328, 2017. DOI: 10.24297/jssr.v11i1.6021. Disponível em: https://rajpub.com/index.php/jssr/article/view/6021. Acesso em: 7 may. 2024.