WU, Xiaoqin P. P.; WANG, Liancheng. Normal form of double-Hopf singularity with 1:1 resonance for delayed differential equations. Nonlinear Analysis: Modelling and Control, [S. l.], v. 24, n. 2, p. 241–260, 2019. DOI: 10.15388/NA.2019.2.6. Disponível em: https://www.zurnalai.vu.lt/nonlinear-analysis/article/view/12901. Acesso em: 1 jul. 2025.