@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/