@article{JRAM_1989__398_153142,
     author = {Peter A. Perry},
     title = {The {Laplace} operator on a hyperbolic manifold. {II.} {Eisenstein} series and the scattering matrix.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {67--91},
     publisher = {mathdoc},
     volume = {398},
     year = {1989},
     zbl = {0677.58044},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1989__398_153142/}
}