@article{CMH_1986__61_140063,
     author = {Thomas Kappeler and Eugene Trubowitz},
     title = {Properties of the scattering map.},
     journal = {Commentarii mathematici Helvetici},
     pages = {442--480},
     publisher = {mathdoc},
     volume = {61},
     year = {1986},
     zbl = {0595.34027},
     url = {http://geodesic.mathdoc.fr/item/CMH_1986__61_140063/}
}