@article{JRAM_1958__200_150371,
     author = {Hugo Schell},
     title = {\"Uber einige {Punkte} der {Addition} von linearen {Punktmengen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {52--88},
     publisher = {mathdoc},
     volume = {200},
     year = {1958},
     zbl = {0084.04404},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1958__200_150371/}
}