Amoa Adele M., Ngo Bilong, et al. “The Determinants Linked to the Trafficking of Precious and Semi-Precious Stones in Cameroon: The Case of Diamonds in the Eastern Region”. Case Studies in Business and Management, vol. 9, no. 1, Dec. 2022, p. 26, doi:10.5296/csbm.v9i1.20756.