@article{JRAM_1983__339_152506,
     author = {Jochen Br\"uning},
     title = {Zum {Eigenwertverteilung} invarianter elliptischer {Operatoren.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {82--96},
     publisher = {mathdoc},
     volume = {339},
     year = {1983},
     zbl = {0526.58048},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1983__339_152506/}
}