KEVIN, NZOUSSI, and Li Jiang Feng. “The Proliferation of Informal Sector Activities in Congo: Case of the City of Brazzaville”. JOURNAL OF SOCIAL SCIENCE RESEARCH 11, no. 1 (April 13, 2017): 2322–2328. Accessed July 22, 2024. https://rajpub.com/index.php/jssr/article/view/6021.