Dynamics of a SVEIR Epidemic Model with a Delay in Diagnosis in a Changing Environment. Contemporary Mathematics , [S. l.], v. 5, n. 3, p. 3762–3789, 2024. DOI: 10.37256/cm.5320244865. Disponível em: https://ojs353.mebyme.cn/index.php/CM/article/view/4865. Acesso em: 24 dec. 2025.