@misc{WM_1897_1_2-3_a8,
     title = {Zagadnienia},
     journal = {Wiadomo\'sci Matematyczne},
     pages = {134--137},
     year = {1897},
     volume = {1},
     number = {2-3},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/WM_1897_1_2-3_a8/}
}