@article{MAN_1890__37_157514,
     author = {Schumacher},
     title = {Classification der algebraischen {Stahlensysteme}},
     journal = {Mathematische Annalen},
     pages = {100--140},
     publisher = {mathdoc},
     volume = {37},
     year = {1890},
     zbl = {22.0818.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1890__37_157514/}
}