@article{JRAM_1900__121_149079,
     author = {Georg Wallenberg},
     title = {Zur {Theorie} der {Differentialinvarianten.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {200--204},
     publisher = {mathdoc},
     volume = {121},
     year = {1900},
     zbl = {30.0299.02},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1900__121_149079/}
}