@article{05237060, title = {Nonlinear periodic systems with the }, journal = {Abstract and Applied Analysis}, volume = {2007}, year = {2007}, doi = {10.1155/2007/80394}, zbl = {1156.34011}, language = {en}, url = {http://dml.mathdoc.fr/item/05237060} }
Papalini, Francesca. Nonlinear periodic systems with the . Abstract and Applied Analysis, Tome 2007 (2007) . doi : 10.1155/2007/80394. http://gdmltest.u-ga.fr/item/05237060/