@article{JRAM_1887__101_148690,
     author = {Hermann Minkowski},
     title = {Zur {Theorie} der positiven quadratischen {Formen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {196--202},
     publisher = {mathdoc},
     volume = {101},
     year = {1887},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1887__101_148690/}
}