Feng Li, Jing Li, Yusen Wu. Computing center conditions for non-analytic vector fields with constant angular speed. Applied Mathematics and Computation, 220:200-207, 2013. [doi]
@article{LiLW13-19,
title = {Computing center conditions for non-analytic vector fields with constant angular speed},
author = {Feng Li and Jing Li and Yusen Wu},
year = {2013},
doi = {10.1016/j.amc.2013.05.061},
url = {http://dx.doi.org/10.1016/j.amc.2013.05.061},
researchr = {https://researchr.org/publication/LiLW13-19},
cites = {0},
citedby = {0},
journal = {Applied Mathematics and Computation},
volume = {220},
pages = {200-207},
}