@article{10_14708_dm_v40i0_6455,
     author = {Lidia Zar\k{e}ba},
     title = {On students{\textquoteright} difficulties in changing their original procedure on the example of a task concerning differential comparison},
     journal = {Didactica Mathematicae},
     pages = { 97--129},
     publisher = {mathdoc},
     volume = {40},
     year = {2018},
     doi = {10.14708/dm.v40i0.6455},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/dm.v40i0.6455/}
}