@article{JRAM_1991__413_153287,
     author = {M. Burger},
     title = {Kazhdan constants for {SL} (3, {Z).}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {36--67},
     publisher = {mathdoc},
     volume = {413},
     year = {1991},
     zbl = {0704.22009},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1991__413_153287/}
}