@article{JRAM_1900__121_149085,
     author = {M. Hamburger},
     title = {Ueber die singul\"aren {L\"osungen} der algebraischen {Differentialgleichungen} h\"oherer {Ordnung.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {265--299},
     publisher = {mathdoc},
     volume = {121},
     year = {1900},
     zbl = {31.0329.01},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1900__121_149085/}
}