Claude, Dounya Matsop, Ngouhouo Ibrahim, Joseph Emmanuel Fantcho, and Tchuani Ngakam Ulrich Ndesil. “The Characteristics and Spatial Modelling of Informal Economies”. Asian Journal of Economic Modelling 8, no. 3 (July 9, 2020): 165–188. Accessed May 2, 2024. https://archive.aessweb.com/index.php/5009/article/view/362.