@article{PMF_1905_16_1_a4,
     author = {K\k{e}pi\'nski, S.},
     title = {O drganiach poprzecznych pr\k{e}t\'ow spr\k{e}\.zystych},
     journal = {Prace Matematyczno-Fizyczne},
     pages = {71--107},
     publisher = {mathdoc},
     volume = {16},
     number = {1},
     year = {1905},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/PMF_1905_16_1_a4/}
}