BUONOMO, Bruno. A note on the direction of the transcritical bifurcation in epidemic models. Nonlinear Analysis: Modelling and Control, [S. l.], v. 20, n. 1, p. 38–55, 2015. DOI: 10.15388/NA.2015.1.3. Disponível em: https://www.journals.vu.lt/nonlinear-analysis/article/view/13544.. Acesso em: 19 jul. 2024.