JAVOHIR HAMROQULOV. Operational efficiency, production costs, and firm-level economic performance: a unified framework. Journal of Production, Operations Management and Economics, [S. l.], v. 6, n. 1, p. 58–68, 2026. Disponível em: https://journal.hmjournals.com/index.php/JPOME/article/view/6484. Acesso em: 16 jul. 2026.