@misc{WM_1903_7_3-4_a1,
     title = {Ewolucya {Mechaniki} {II.} {Mechanika} analityczna},
     journal = {Wiadomo\'sci Matematyczne},
     pages = {137--168},
     publisher = {mathdoc},
     volume = {7},
     number = {3-4},
     year = {1903},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/WM_1903_7_3-4_a1/}
}