@article{10_14708_dm_v29i01_6533,
     author = {Jan Gun\'caga and Zbigniew Pow\k{a}zka},
     title = {Badania nad wykorzystaniem poj\k{e}cia ci\k{a}g{\l}o\'sci funkcji do definiowania pochodnej funkcji w punkcie},
     journal = {Didactica Mathematicae},
     pages = { 5--28},
     publisher = {mathdoc},
     volume = {29},
     number = {01},
     year = {2006},
     doi = {10.14708/dm.v29i01.6533},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/dm.v29i01.6533/}
}