@article{JRAM_1929__160_149676,
     author = {Erik Svenson},
     title = {Zur {Theorie} der {Summengleichungen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {38--60},
     publisher = {mathdoc},
     volume = {160},
     year = {1929},
     zbl = {55.0236.02},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1929__160_149676/}
}