AL-MAJALI, A. A.; ADAYLEH, R. M. International Competitiveness in Services in Some Middle East and North Africa Countries Using Gravity Model. International Review of Management and Marketing, [S. l.], v. 8, n. 2, p. 53–62, 2018. Disponível em: https://econjournals.com/index.php/irmm/article/view/6059. Acesso em: 28 apr. 2024.