PARASKEVOPOULOS, P. Global bifurcation of oscillatory periodic solutions of delay differential equations. Topological Methods in Nonlinear Analysis, [S. l.], v. 12, n. 1, p. 137–152, 1998. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1998.032. Acesso em: 28 mar. 2023.