@misc{WM_1898_2_1-2_a5,
     title = {Z powodu {"Zasad} fizyki" prof. {A.} {Witkowskiego}},
     journal = {Wiadomo\'sci Matematyczne},
     pages = {36--41},
     publisher = {mathdoc},
     volume = {2},
     number = {1-2},
     year = {1898},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/WM_1898_2_1-2_a5/}
}