@article{10_14708_dm_v7i01_6916,
     author = {Hans-Georg Steiner},
     title = {Kierunki i problemy badawcze dydaktyki matematyki},
     journal = {Didactica Mathematicae},
     pages = { 117--141},
     publisher = {mathdoc},
     volume = {7},
     number = {01},
     year = {1987},
     doi = {10.14708/dm.v7i01.6916},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/dm.v7i01.6916/}
}