@article{JRAM_1901__123_149128,
     author = {M. Hamburger},
     title = {Zur {Theorie} der linearen {Differentialgleichungen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {343--347},
     publisher = {mathdoc},
     volume = {123},
     year = {1901},
     zbl = {32.0317.02},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1901__123_149128/}
}