@article{10_14708_wm_v19i02_3504,
     author = {J. Mikusi\'nskiiP. Mikusi\'nski},
     title = {Liczby naturalne i ich aksjomatyka},
     journal = {Wiadomo\'sci Matematyczne},
     pages = { 137--140},
     publisher = {mathdoc},
     volume = {19},
     number = {02},
     year = {1975},
     doi = {10.14708/wm.v19i02.3504},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/wm.v19i02.3504/}
}