@article{10_14708_wm_v11i1_2099,
     author = {T. Figiel},
     title = {O r\'ownaniu funkcyjnym f(x+y) = f(x)+f(y)},
     journal = {Wiadomo\'sci Matematyczne},
     pages = { 15--18},
     publisher = {mathdoc},
     volume = {11},
     number = {1},
     year = {1969},
     doi = {10.14708/wm.v11i1.2099},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/wm.v11i1.2099/}
}