@article{MZ_1921__9_167622,
     author = {J., K\"ursch\'ak},
     title = {Eine {Irreduzibilit\"atssatz} in der {Theorie} der symmetrischen {Matrizen}},
     journal = {Mathematische Zeitschrift},
     pages = {191--195},
     publisher = {mathdoc},
     volume = {9},
     year = {1921},
     zbl = {48.0111.01},
     url = {http://geodesic.mathdoc.fr/item/MZ_1921__9_167622/}
}