@article{articlea5628535,
title   = {On the integrability and the zero-Hopf bifurcation of a Chen-Wang differential system},
author = {Llibre, Jaume and Oliveira, Regilene Delazari dos Santos and Valls, Claudia},
year = {2015},
doi = {10.1007/s11071-014-1873-4},
journal   = {Nonlinear Dynamics}
}