@article{10_14708_dm_v34i0_422,
     author = {Piotr Zarzycki},
     title = {Wybrane z {Math.} {Educ.} i z {ZDM,} cz\k{e}\'s\'c {XVII}},
     journal = {Didactica Mathematicae},
     publisher = {mathdoc},
     volume = {34},
     year = {2012},
     doi = {10.14708/dm.v34i0.422},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/dm.v34i0.422/}
}