@article{JRAM_1908__133_149279,
     author = {Moritz R\'ethy},
     title = {\"Uber {Stabilit\"at} und {Labilit\"at} eines materiellen {Punktes} im widerstrebenden {Mittel.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {284--288},
     publisher = {mathdoc},
     volume = {133},
     year = {1908},
     zbl = {39.0755.03},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1908__133_149279/}
}