@article{PMF_1920_31_1_a3,
     author = {Witwi\'nski, Romuald},
     title = {Sur certaines surfaces g\'en\'eralisant les surfaces minima},
     journal = {Prace Matematyczno-Fizyczne},
     pages = {23--30},
     publisher = {mathdoc},
     volume = {31},
     number = {1},
     year = {1920},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/PMF_1920_31_1_a3/}
}