@article{JRAM_1897__118_149022,
     author = {Alf Guldberg},
     title = {Zur {Integration} der gew\"ohnlichen {Differentialgleichungen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {158--162},
     publisher = {mathdoc},
     volume = {118},
     year = {1897},
     zbl = {28.0273.02},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1897__118_149022/}
}