A Comparative Analysis of Cognitive Fatigue and Operational Efficiency Between Day- Shift and Night-Shift Employees in BPO Environments. The International Review of Multidisciplinary Research, [S. l.], v. 1, n. 5, p. 819–834, 2026. DOI: 10.5281/zenodo.20269386. Disponível em: https://vertexcorp.org/index.php/irmr/article/view/393. Acesso em: 28 may. 2026.