@article{MAN_1949__121_160192,
     author = {Ott-Heinrich Keller},
     title = {Zur {Theorie} der ebenen, algebraischen {Ber\"uhrungstransformationen.} {II.} {Die} charakteristische {Determinante.}},
     journal = {Mathematische Annalen},
     pages = {467--495},
     publisher = {mathdoc},
     volume = {121},
     year = {1949},
     zbl = {0036.11001},
     url = {http://geodesic.mathdoc.fr/item/MAN_1949__121_160192/}
}