@article{JRAM_1953__192_150250,
     author = {Hans Rohrbach and Bodo Volkmann},
     title = {Zur {Theorie} der asymptotischen {Dichte.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {102--112},
     publisher = {mathdoc},
     volume = {192},
     year = {1953},
     zbl = {0050.26903},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1953__192_150250/}
}