@article{JRAM_1928__159_149670,
     author = {F. Klein},
     title = {Zur {Theorie} der linearen {Kongruenzsysteme.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {238--245},
     publisher = {mathdoc},
     volume = {159},
     year = {1928},
     zbl = {54.0171.04},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1928__159_149670/}
}