@article{10_14708_dm_v9i01_6874,
     author = {Teresa Kisielewicz},
     title = {Metoda badania trudno\'sci wyst\k{e}puj\k{a}cych w toku rozwi\k{a}zywania przez uczni\'ow problem\'ow matematycznych},
     journal = {Didactica Mathematicae},
     pages = { 43--86},
     publisher = {mathdoc},
     volume = {9},
     number = {01},
     year = {1988},
     doi = {10.14708/dm.v9i01.6874},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/dm.v9i01.6874/}
}