@article{JRAM_1957__197_150325,
     author = {Erich Lamprecht},
     title = {Struktur und {Relationen} allgemeiner {Gau{\ss}scher} {Summen} in endlichen {Ringen.} {I.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {1--26},
     publisher = {mathdoc},
     volume = {197},
     year = {1957},
     zbl = {0077.04901},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1957__197_150325/}
}