@article{AUPCDM_2014_6_1_a4,
     author = {Fory\'s, Urszula},
     title = {Co mo\.zemy opisa\'c uk{\l}adem dynamicznym?},
     journal = {Annales Universitatis Paedagogicae Cracoviensis. Studia ad Didacticam Mathematicae Pertinentia},
     pages = {73--85},
     publisher = {mathdoc},
     volume = {6},
     number = {1},
     year = {2014},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/AUPCDM_2014_6_1_a4/}
}