@article{CMH_1995__70_3_140362,
     author = {A.I. Bobenko and Sergej B. Kuksin},
     title = {The nonlinear {Klein-Gordon} equation on an interval as a perturbed {Sine-Gordon} equation.},
     journal = {Commentarii mathematici Helvetici},
     pages = {63--112},
     publisher = {mathdoc},
     volume = {70},
     number = {3},
     year = {1995},
     zbl = {0842.35099},
     url = {http://geodesic.mathdoc.fr/item/CMH_1995__70_3_140362/}
}