de Holanda Barbosa, Fernando, Rubens Penha Cysne, and Marcos Costa Holanda. “Underinvoicing of Exports, Overinvoicing of Imports, and the Dollar Premium on the Black Market”. Estudios Económicos de El Colegio de México 7, no. 1 (January 1, 1992): 69–83. Accessed May 7, 2024. https://estudioseconomicos.colmex.mx/index.php/economicos/article/view/304.