@article{JRAM_1993__437_153508,
     author = {Richard Dipper and Jie Du},
     title = {Harish-Chandra vertices.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {101--130},
     publisher = {mathdoc},
     volume = {437},
     year = {1993},
     zbl = {0768.20004},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1993__437_153508/}
}