@article{10_14708_dm_v33i0_33,
     author = {Lidia Zar\k{e}ba and Janina Wiercioch},
     title = {Julileusz {Profesor} {Heleny} {Siwek}},
     journal = {Didactica Mathematicae},
     publisher = {mathdoc},
     volume = {33},
     year = {2010},
     doi = {10.14708/dm.v33i0.33},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/dm.v33i0.33/}
}