@article{01452802, title = {Periodic solutions of systems with asymptotically even nonlinearities.}, journal = {Journal of Applied Mathematics and Stochastic Analysis}, volume = {13}, year = {2000}, pages = {41-50}, doi = {10.1155/S1048953300000058}, zbl = {0957.47044}, language = {en}, url = {http://dml.mathdoc.fr/item/01452802} }
Kloeden, Peter E.; Krasnosel'skii, Alexander M. Periodic solutions of systems with asymptotically even nonlinearities.. Journal of Applied Mathematics and Stochastic Analysis, Tome 13 (2000) pp. 41-50. doi : 10.1155/S1048953300000058. http://gdmltest.u-ga.fr/item/01452802/