Yan Luo, Weibing Wang, Jianhua Shen. Existence of positive periodic solutions for two kinds of neutral functional differential equations. Appl. Math. Lett., 21(6):581-587, 2008. [doi]
@article{LuoWS08,
title = {Existence of positive periodic solutions for two kinds of neutral functional differential equations},
author = {Yan Luo and Weibing Wang and Jianhua Shen},
year = {2008},
doi = {10.1016/j.aml.2007.07.009},
url = {http://dx.doi.org/10.1016/j.aml.2007.07.009},
researchr = {https://researchr.org/publication/LuoWS08},
cites = {0},
citedby = {0},
journal = {Appl. Math. Lett.},
volume = {21},
number = {6},
pages = {581-587},
}