@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/