@article{JDM_1894__3_144413,
     author = {K. D\"ohlemann},
     title = {Zur {Theorie} des {Nullsystems.}},
     journal = {Jahresbericht der Deutschen Mathematiker-Vereinigung},
     pages = {96--99},
     publisher = {mathdoc},
     volume = {3},
     year = {1894},
     zbl = {25.1291.02},
     url = {http://geodesic.mathdoc.fr/item/JDM_1894__3_144413/}
}