@article{MAPO_2017_4_1_a1,
     author = {Jurasi\'nska, Renata},
     title = {Co s{\l}ycha\'c?},
     journal = {Matematyka Pogl\k{a}dowa},
     pages = {1},
     publisher = {mathdoc},
     volume = {4},
     number = {1},
     year = {2017},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/MAPO_2017_4_1_a1/}
}