@article{MZ_1990__203_3_174124,
     author = {Pierre-A. Vuillermot},
     title = {Quasiperiodic {Soliton} {Solutions} to {Nonlinear} {Klein-Gordon} {Equations} on {IR2.}},
     journal = {Mathematische Zeitschrift},
     pages = {235--254},
     publisher = {mathdoc},
     volume = {203},
     number = {3},
     year = {1990},
     zbl = {0666.35076},
     url = {http://geodesic.mathdoc.fr/item/MZ_1990__203_3_174124/}
}