@article{10_14708_dm_v29i01_6542,
     author = {Joanna Major},
     title = {Rola zada\'n i problem\'ow w kszta{\l}towaniu poj\k{e}\'c matematycznych na przyk{\l}adzie bezwzgl\k{e}dnej warto\'sci liczby rzeczywistej},
     journal = {Didactica Mathematicae},
     pages = { 297--310},
     publisher = {mathdoc},
     volume = {29},
     number = {01},
     year = {2006},
     doi = {10.14708/dm.v29i01.6542},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/dm.v29i01.6542/}
}