@article{1101306019, author = {Liu, Xi-lan and Zhang, Guang and Cheng, Sui Sun}, title = {Existence of triple positive periodic solutions of a functional differential equation depending on a parameter}, journal = {Abstr. Appl. Anal.}, volume = {2004}, number = {1}, year = {2004}, pages = { 897-905}, language = {en}, url = {http://dml.mathdoc.fr/item/1101306019} }
Liu, Xi-lan; Zhang, Guang; Cheng, Sui Sun. Existence of triple positive periodic solutions of a functional differential equation depending on a parameter. Abstr. Appl. Anal., Tome 2004 (2004) no. 1, pp. 897-905. http://gdmltest.u-ga.fr/item/1101306019/