Uncertain Multi-Period Efficiency in Data Envelopment Analysis: Performance Evaluation of Healthcare Systems in the Face of COVID- 19 Pandemic. Contemporary Mathematics , [S. l.], v. 6, n. 4, p. 5317–5345, 2025. DOI: 10.37256/cm.6420257552. Disponível em: https://ojs353.mebyme.cn/index.php/CM/article/view/7552. Acesso em: 24 dec. 2025.