@article{JRAM_1908__134_149293,
     author = {Moritz R\'ethy},
     title = {\"Uber {Labilit\"at} eines materiellen {Punktes} im widerstrebenden {Mittel.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {299--307},
     year = {1908},
     volume = {134},
     zbl = {39.0755.04},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1908__134_149293/}
}