1. Guangfeng Dong, Changjian Liu, Jiazhong Yang, On the maximal saddle order of p:-q resonant saddle, Discrete & Continuous Dynamical Systems – A, 39(10), 5729-5742, 2019.
2. Guangfeng Dong, Changjian Liu, Jiazhong Yang, On the topology of isochronous centers of Hamiltonian differential systems, International Journal of Bifurcation and Chaos, 29(6), 2019.
3. Guangfeng Dong, Changjian Liu. Note on limit cycles for m-piecewise discontinuous polynomial Lienard differential equations , Zeitschrift fur Angewandte Mathematik und Physik, 2017, 68(4).
4. Guangfeng Dong, Changjian Liu, Jiazhong Yang, The complexity of generalized center problem, Qual. Theory Dyn. Syst. 14 (2015) 11-23.
5. Guangfeng Dong, Jiazhong Yang, On the saddle order of polynomial differential systems at a resonant singular point, J. Math. Anal. Appl. 423 (2015)
1557-1569.
6. Guangfeng Dong, Linearizability of homogeneous quartic polynomial systems with 1:−2 resonance, J. Math. Anal. Appl. 396(2012) 215-224.