@article{JRAM_1906__131_149249,
     author = {P. Bohl},
     title = {\"Uber eine {Differentialgleichung} der {St\"orungstheorie.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {268--321},
     publisher = {mathdoc},
     volume = {131},
     year = {1906},
     zbl = {37.0343.02},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1906__131_149249/}
}