Stochastic SEIR Model with Two Infectious Classes Under Environmental Variability: Well-Posedness, Extinction Persistence Thresholds, and Milstein Based 3D Simulations. Contemporary Mathematics , [S. l.], v. 6, n. 6, p. 8128–8145, 2025. DOI: 10.37256/cm.6620258833. Disponível em: https://ojs353.mebyme.cn/index.php/CM/article/view/8833. Acesso em: 24 dec. 2025.