@article{10_14708_dm_v19i01_6764,
     author = {. Redakcja},
     title = {CIEAEM 50},
     journal = {Didactica Mathematicae},
     pages = { 150},
     publisher = {mathdoc},
     volume = {19},
     number = {01},
     year = {1997},
     doi = {10.14708/dm.v19i01.6764},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/dm.v19i01.6764/}
}