Pei Yu, Yun Tian. Twelve limit cycles around a singular point in a planar cubic-degree polynomial system. Commun. Nonlinear Sci. Numer. Simul., 19(8):2690-2705, 2014. [doi]
@article{YuT14-4,
title = {Twelve limit cycles around a singular point in a planar cubic-degree polynomial system},
author = {Pei Yu and Yun Tian},
year = {2014},
doi = {10.1016/j.cnsns.2013.12.014},
url = {https://doi.org/10.1016/j.cnsns.2013.12.014},
researchr = {https://researchr.org/publication/YuT14-4},
cites = {0},
citedby = {0},
journal = {Commun. Nonlinear Sci. Numer. Simul.},
volume = {19},
number = {8},
pages = {2690-2705},
}