@misc{WM_1905_9_3-4-5-6_a4,
     title = {Kronika},
     journal = {Wiadomo\'sci Matematyczne},
     pages = {241--248},
     publisher = {mathdoc},
     volume = {9},
     number = {3-4-5-6},
     year = {1905},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/WM_1905_9_3-4-5-6_a4/}
}