Stability and Hopf Bifurcation for an SEIR Epidemic Model with Delay. Advances in the Theory of Nonlinear Analysis and its Application, [S. l.], v. 2, n. 3, p. 113–127, 2018. Disponível em: https://mail.atnaea.org/index.php/journal/article/view/31.. Acesso em: 19 apr. 2026.