Mathematical Modeling of  SEIRV Epidemic Model with Delay and Optimal Control of Holling type II. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 18, n. 4, p. 6254, 2025. DOI: 10.29020/nybg.ejpam.v18i4.6254. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/6254. Acesso em: 5 dec. 2025.