@article{DBLP:journals/appml/KangSW10,
author = {Shugui Kang and
Bao Shi and
Genqiang Wang},
title = {Existence of maximal and minimal periodic solutions for
first-order functional differential equations},
journal = {Appl. Math. Lett.},
volume = {23},
number = {1},
year = {2010},
pages = {22-25},
ee = {http://dx.doi.org/10.1016/j.aml.2009.08.004},
bibsource = {DBLP, http://dblp.uni-trier.de}
}