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 2021, 7, 139-154.