FIRMANSYAH, I. . Improving The Islamic Banks Competitiveness Through Efficiency: Two-Stages DEA Analysis. Islamic Economics Methodology, [S. l.], v. 1, n. 1, 2022. DOI: 10.58968/iem.v1i1.100. Disponível em: http://journals.smartinsight.id/index.php/IEM/article/view/100. Acesso em: 27 oct. 2025.