@article{JRAM_1991__420_153354,
     author = {M. Cowling and T. Steger},
     title = {The irreducibility of restrictions of unitary representations of lattices.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {85--98},
     publisher = {mathdoc},
     volume = {420},
     year = {1991},
     zbl = {0760.22014},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1991__420_153354/}
}