@article{01930015, title = {Invariant manifold of hyperbolic-elliptic type for nonlinear wave equation.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {2003}, year = {2003}, pages = {1111-1136}, doi = {10.1155/S0161171203207092}, zbl = {1017.37040}, language = {en}, url = {http://dml.mathdoc.fr/item/01930015} }
Yuan, Xiaoping. Invariant manifold of hyperbolic-elliptic type for nonlinear wave equation.. International Journal of Mathematics and Mathematical Sciences, Tome 2003 (2003) pp. 1111-1136. doi : 10.1155/S0161171203207092. http://gdmltest.u-ga.fr/item/01930015/