Normal forms and versal unfoldings in GLV /

מאת Zhang, Weinian.

Weak centers and local bifurcations of critical periods at infinity for a class of rational systems /

מאת Huang, Wentao., Romanovski, Valery., Zhang, Weinian.

Critical periods of perturbations of reversible rigidly isochronous centers /

מאת Chen, Xingwu., Romanovski, Valery., Zhang, Weinian.

Persistent centers of complex systems /

מאת Chen, Xingwu., Romanovski, Valery., Zhang, Weinian.

Degenerate Hopf bifurcations in a family of FF-type switching systems /

מאת Chen, Xingwu., Romanovski, Valery., Zhang, Weinian.

Non-isochronicity of the center at the origin in polynomial Hamiltonian systems with even degree nonlinearities /

מאת Chen, Xingwu., Romanovski, Valery., Zhang, Weinian.

Linearizability conditions of time-reversible quartic systems having homogeneous nonlinearities /

מאת Chen, Xingwu., Romanovski, Valery., Zhang, Weinian.

Linearizability and local bifurcation of critical periods in a cubic Kolmogorov system /

מאת Chen, Xingwu., Huang, Wentao., Romanovski, Valery., Zhang, Weinian.

Linearizability conditions of a time-reversible quartic-like system /

מאת Chen, Xingwu., Huang, Wentao., Romanovski, Valery., Zhang, Weinian.

Identifying weak foci and centers in the Maxwell-Bloch system /

מאת Liu, Lingling, 1958-, Aybar, Orhan Ozgur., Romanovski, Valery., Zhang, Weinian.