The following publications are possibly variants of this publication:
- On the Number of Limit Cycles by Perturbing a Piecewise Smooth Liénard ModelLijuan Sheng, Maoan Han, Valery Romanovsky. IJBC, 26(10):1-16, 2016. [doi]
- Number of Limit cycles of some Polynomial LiéNard SystemsWeijiao Xu, Cuiping Li. IJBC, 23(4), 2013. [doi]
- Limit cycle bifurcations in a class of perturbed piecewise smooth systemsYanqin Xiong, Maoan Han. amc, 242:47-64, 2014. [doi]
- Limit Cycle Bifurcations in a Class of Piecewise Smooth Polynomial SystemsMeilan Cai, Maoan Han. IJBC, 31(14), 2021. [doi]