LIU, Lishan; SUN, Fenglong; ZHANG, Xinguang; WU, Yonghong. Bifurcation analysis for a singular differential system with two parameters via to topological degree theory. Nonlinear Analysis: Modelling and Control, [S. l.], v. 22, n. 1, p. 31–50, 2017. DOI: 10.15388/NA.2017.1.3. Disponível em: https://www.zurnalai.vu.lt/nonlinear-analysis/article/view/13408. Acesso em: 1 jul. 2025.