SHANG, Yilun. Global stability of disease-free equilibria in a two-group SI model with feedback control. Nonlinear Analysis: Modelling and Control, [S. l.], v. 20, n. 4, p. 501–508, 2015. DOI: 10.15388/NA.2015.4.3. Disponível em: https://www.zurnalai.vu.lt/nonlinear-analysis/article/view/13508. Acesso em: 21 oct. 2025.