@article{JRAM_1909__136_149308,
     author = {Oskar Perron},
     title = {\"Uber einen {Satz} des {Herrn} {Poincar\'e.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {17--37},
     publisher = {mathdoc},
     volume = {136},
     year = {1909},
     zbl = {40.0385.01},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1909__136_149308/}
}