@article{05028347, title = {Multiple periodic solutions for a class of second-order nonlinear neutral delay equations.}, journal = {Abstract and Applied Analysis}, volume = {2006}, year = {2006}, doi = {10.1155/AAA/2006/10252}, zbl = {1145.34039}, language = {en}, url = {http://dml.mathdoc.fr/item/05028347} }
Shu, Xiao-Bao; Xu, Yuan-Tong. Multiple periodic solutions for a class of second-order nonlinear neutral delay equations.. Abstract and Applied Analysis, Tome 2006 (2006) . doi : 10.1155/AAA/2006/10252. http://gdmltest.u-ga.fr/item/05028347/