@misc{WM_1907_11_4-5-6_a6,
     title = {Kronika},
     journal = {Wiadomo\'sci Matematyczne},
     pages = {278--286},
     year = {1907},
     volume = {11},
     number = {4-5-6},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/WM_1907_11_4-5-6_a6/}
}