@article{10_14708_dm_v11i01_6857,
     author = {Bernaro Parzysz},
     title = {{\quotedblbase}Widzie\'c" i {\quotedblbase}wiedzie\'c"},
     journal = {Didactica Mathematicae},
     pages = { 117--131},
     year = {1989},
     volume = {11},
     number = {01},
     doi = {10.14708/dm.v11i01.6857},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/dm.v11i01.6857/}
}