@article{10_14708_dm_v23i01_6716,
     author = {Marianna Ciosek and Maciej Klakla},
     title = {CIEAEM 53},
     journal = {Didactica Mathematicae},
     pages = { 172--183},
     publisher = {mathdoc},
     volume = {23},
     number = {01},
     year = {2001},
     doi = {10.14708/dm.v23i01.6716},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/dm.v23i01.6716/}
}