Fu-Hsiang Wong, Shang-Wen Lin, Wei-Cheng Lian, Shiueh-Ling Yu. Existence of periodic solutions of higher-order differential equations. Mathematical and Computer Modelling, 41(2-3):215-225, 2005. [doi]
@article{WongLLY05,
title = {Existence of periodic solutions of higher-order differential equations},
author = {Fu-Hsiang Wong and Shang-Wen Lin and Wei-Cheng Lian and Shiueh-Ling Yu},
year = {2005},
doi = {10.1016/j.mcm.2004.05.003},
url = {http://dx.doi.org/10.1016/j.mcm.2004.05.003},
researchr = {https://researchr.org/publication/WongLLY05},
cites = {0},
citedby = {0},
journal = {Mathematical and Computer Modelling},
volume = {41},
number = {2-3},
pages = {215-225},
}