CABALLERO GONZÁLEZ, A. C.; GARDNER FLORES, G. .; MOELLER DÁVILA, E. .; SEGURA RODRÍGUEZ, S. E. .; NAVA-AGUIRRE, K. M. Non-tariff regulations and restrictions: the impact of the modification of the benefit of the "non-commercialization letter" in Mexican importing companies. RAN - Revista Academia & Negocios, v. 7, n. 2, p. 139-154, 1 Jul. 2021.