@article{AUPCDM_2012_4_1_a1,
     author = {B{\l}aszczyk, Piotr},
     title = {O cia{\l}ach uporz\k{a}dkowanych},
     journal = {Annales Universitatis Paedagogicae Cracoviensis. Studia ad Didacticam Mathematicae Pertinentia},
     pages = {15--30},
     publisher = {mathdoc},
     volume = {4},
     number = {1},
     year = {2012},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/AUPCDM_2012_4_1_a1/}
}