@article{JRAM_1909__135_149304,
     author = {P. Bohl},
     title = {\"Uber ein in der {Theorie} der s\"akularen {St\"orungen} vorkommendes {Problem.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {189--283},
     publisher = {mathdoc},
     volume = {135},
     year = {1909},
     zbl = {40.1005.03},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1909__135_149304/}
}