@article{10_14708_dm_v24i01_6680,
     author = {Zbigniew Semadeni},
     title = {Trudno\'sci epistemologiczne zwi\k{a}zane z poj\k{e}ciami: pary uporz\k{a}dkowanej i funkcji},
     journal = {Didactica Mathematicae},
     pages = { 119--144},
     year = {2002},
     volume = {24},
     number = {01},
     doi = {10.14708/dm.v24i01.6680},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/dm.v24i01.6680/}
}