@article{PMF_1912_23_1_a4,
     author = {Rybczy\'nski, W.},
     title = {Przyczynek do teoryi uginania promieni r\"ontgenowskich},
     journal = {Prace Matematyczno-Fizyczne},
     pages = {31--50},
     publisher = {mathdoc},
     volume = {23},
     number = {1},
     year = {1912},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/PMF_1912_23_1_a4/}
}