@article{JRAM_1871__73_148142,
     author = {L. Pochhammer},
     title = {Ueber einfache singul\"are {Punkte} linearer {Differentialgleichungen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {69--84},
     year = {1871},
     volume = {73},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1871__73_148142/}
}