@article{AUPCDM_2012_4_1_a15,
     author = {Hilbert, David},
     title = {O poj\k{e}ciu liczby},
     journal = {Annales Universitatis Paedagogicae Cracoviensis. Studia ad Didacticam Mathematicae Pertinentia},
     pages = {199--202},
     publisher = {mathdoc},
     volume = {4},
     number = {1},
     year = {2012},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/AUPCDM_2012_4_1_a15/}
}