@article{JRAM_1876__81_183412,
     author = {R. Lipschitz},
     title = {G\'en\'eralisation de la th\'eorie du rayon osculateur d'une surface.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {295--300},
     publisher = {mathdoc},
     volume = {81},
     year = {1876},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1876__81_183412/}
}