Llibre, Jaume; Yu, Jiang; Zhang, Xiang Limit cycles coming from the perturbation of 2-dimensional centers of vector fields in \(\mathbb R^3\). (English) Zbl 1202.37072 Dyn. Syst. Appl. 17, No. 3-4, 625-635 (2008). Cited in 1 Document MSC: 37G15 Bifurcations of limit cycles and periodic orbits in dynamical systems PDFBibTeX XMLCite \textit{J. Llibre} et al., Dyn. Syst. Appl. 17, No. 3--4, 625--635 (2008; Zbl 1202.37072)