@article{10_14708_dm_v40i0_6433,
     author = {Bruno Scheja and Sabine Castelli},
     title = {Developing teacher competence regarding the cognitive requirement of mathematical tasks {\textendash} a video-based intervention},
     journal = {Didactica Mathematicae},
     pages = { 65--95},
     publisher = {mathdoc},
     volume = {40},
     year = {2018},
     doi = {10.14708/dm.v40i0.6433},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/dm.v40i0.6433/}
}