Yirong Liu, Jibin Li. Center Problem and Multiple Hopf bifurcation for the Z::6::-Equivariant Planar Polynomial Vector, Fields of Degree 5. I. J. Bifurcation and Chaos, 19(5):1741-1749, 2009. [doi]
@article{LiuL09-51,
title = {Center Problem and Multiple Hopf bifurcation for the Z::6::-Equivariant Planar Polynomial Vector, Fields of Degree 5},
author = {Yirong Liu and Jibin Li},
year = {2009},
doi = {10.1142/S0218127409023950},
url = {http://dx.doi.org/10.1142/S0218127409023950},
researchr = {https://researchr.org/publication/LiuL09-51},
cites = {0},
citedby = {0},
journal = {I. J. Bifurcation and Chaos},
volume = {19},
number = {5},
pages = {1741-1749},
}