1、 Z.P. Hu, V.G. Romanovski, D.S. Shafer. 1:-3 resonant centers of certain cubic systems on . Computers and Mathematics with Applications. 56 (2008), 1927-1940.
2、 Z.P. Hu, M.A. Han. Periodic Solutions and Bifurcations of First-order Periodic Impulsive Differential Equations. Int. J. Bifur. Chaos. 19 (2009), 2512-2530.
3、 G.H. Xiang, Z.P. Hu. Resonant Bifurcations of Periodic Orbits in High Dimensional Syatems. Int. J. Bifur. Chaos. 19(2009), 2417-2422.
4、 V.G. Romanovski, X.W. Chen, Z.P. Hu. Linearizability of linear Systems perturbed by fifth degree homogeneous polynomials. J. Physics A: Math. Theor.. 40 (2007), 5905-5919.
5、 Z.P. Hu, B. Gao, V.G. Romanovski. Limit cycles bifurcating from centers of symmetric Hamiltonian systems perturbing by cubic polynomials. Int. J. Bifur. Chaos. In press.