Periodic solutions for a kind of Rayleigh equation with a deviating argument

@article{Lu2004PeriodicSF,
title={Periodic solutions for a kind of Rayleigh equation with a deviating argument},
author={Shiping Lu and Weigao Ge and Zuxiou Zheng},
journal={Appl. Math. Lett.},
year={2004},
volume={17},
pages={443-449}
}