UMID, K. . The Effect of Competition on Improving the Efficiency and Quality of Services in the Service Sector. European Multidisciplinary Journal of Modern Science, [S. l.], v. 17, p. 94–97, 2023. Disponível em: https://emjms.academicjournal.io/index.php/emjms/article/view/935. Acesso em: 22 jul. 2024.