@article{02163608,
title = {Existence of triple positive periodic solutions of a functional differential equation depending on a parameter.},
journal = {Abstract and Applied Analysis},
volume = {2004},
year = {2004},
pages = {897-905},
doi = {10.1155/S1085337504311085},
zbl = {1085.34546},
language = {en},
url = {http://dml.mathdoc.fr/item/02163608}
}
Liu, Xi-Lan; Zhang, Guang; Cheng, Sui Sun. Existence of triple positive periodic solutions of a functional differential equation depending on a parameter.. Abstract and Applied Analysis, Tome 2004 (2004) pp. 897-905. doi : 10.1155/S1085337504311085. http://gdmltest.u-ga.fr/item/02163608/