Gissell González del Puerto A, Torres Villalba G, Susana Villalba Román E. THE INFLUENCE OF THE INFORMAL SECTOR BEFORE A CURRENCY EXCHANGE COMPANY. GEI [Internet]. 2023 Oct. 18 [cited 2026 May 1];4(01):623-72. Available from: https://periodicojs.com.br/gei/article/view/1663