@article{MAN_1903__57_158112,
     author = {M. Lerch},
     title = {Zur {Theorie} der {Gau{\ss}schen} {Summen}},
     journal = {Mathematische Annalen},
     pages = {554--567},
     year = {1903},
     volume = {57},
     zbl = {34.0228.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1903__57_158112/}
}