@article{AUPCDM_2012_4_1_a9,
     author = {Pow\k{a}zka, Zbigniew},
     title = {Z bada\'n nad trudno\'sciami student\'ow w rozumieniu poj\k{e}cia miary i ca{\l}ki},
     journal = {Annales Universitatis Paedagogicae Cracoviensis. Studia ad Didacticam Mathematicae Pertinentia},
     pages = {139--154},
     publisher = {mathdoc},
     volume = {4},
     number = {1},
     year = {2012},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/AUPCDM_2012_4_1_a9/}
}