@article{JRAM_1894__113_148921,
     author = {Paul St\"ackel},
     title = {Ueber {Biegungen} von n-fach ausgedehnten {Mannigfaltigkeiten.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {102--114},
     publisher = {mathdoc},
     volume = {113},
     year = {1894},
     zbl = {25.1278.02},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1894__113_148921/}
}