@article{05849066, title = {First integrals for two linearly coupled nonlinear Duffing oscillators.}, journal = {Mathematical Problems in Engineering}, volume = {2011}, year = {2011}, doi = {10.1155/2011/831647}, zbl = {1210.34055}, language = {en}, url = {http://dml.mathdoc.fr/item/05849066} }
Naz, R.; Naeem, I.; Mahomed, F.M. First integrals for two linearly coupled nonlinear Duffing oscillators.. Mathematical Problems in Engineering, Tome 2011 (2011) . doi : 10.1155/2011/831647. http://gdmltest.u-ga.fr/item/05849066/