@article{MOMA_1978__86_177887,
     author = {Rudolf Fritsch},
     title = {Ein },
     journal = {Monatshefte f\"ur Mathematik},
     pages = {177--184},
     publisher = {mathdoc},
     volume = {86},
     year = {1978},
     zbl = {0364.50009},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1978__86_177887/}
}