@article{05816371, title = {The initial value problem for the quadratic nonlinear Klein-Gordon equation.}, journal = {Advances in Mathematical Physics}, volume = {2010}, year = {2010}, doi = {10.1155/2010/504324}, zbl = {1201.81048}, language = {en}, url = {http://dml.mathdoc.fr/item/05816371} }
Hayashi, Nakao; Naumkin, Pavel I. The initial value problem for the quadratic nonlinear Klein-Gordon equation.. Advances in Mathematical Physics, Tome 2010 (2010) . doi : 10.1155/2010/504324. http://gdmltest.u-ga.fr/item/05816371/