@misc{WM_1897_1_4-5_a1,
     title = {Ubezpieczenie premij na przypadek niezdolno\'sci do pracy},
     journal = {Wiadomo\'sci Matematyczne},
     pages = {170--174},
     publisher = {mathdoc},
     volume = {1},
     number = {4-5},
     year = {1897},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/WM_1897_1_4-5_a1/}
}