@misc{WM_1908_12_5-6_a4,
     title = {Uwiadomienie},
     journal = {Wiadomo\'sci Matematyczne},
     pages = {193--194},
     year = {1908},
     volume = {12},
     number = {5-6},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/WM_1908_12_5-6_a4/}
}