@article{PMF_1917_28_1_a5,
     author = {Witwi\'nski, Romuald},
     title = {Sur le probl\`eme de {Ribaucour.}},
     journal = {Prace Matematyczno-Fizyczne},
     pages = {101--108},
     publisher = {mathdoc},
     volume = {28},
     number = {1},
     year = {1917},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/PMF_1917_28_1_a5/}
}