@article{MAPO_2017_4_1_a2,
     author = {Traczyk, Pawe{\l}},
     title = {Kolorowe w\k{e}z{\l}y, kolorowe sploty},
     journal = {Matematyka Pogl\k{a}dowa},
     pages = {2--6},
     publisher = {mathdoc},
     volume = {4},
     number = {1},
     year = {2017},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/MAPO_2017_4_1_a2/}
}