@article{10_14708_am_v10i0_1545,
     author = {Jan Waszkiewicz},
     title = {The two {Warsaw}},
     journal = {Antiquitates Mathematicae},
     pages = { 223--229},
     publisher = {mathdoc},
     volume = {10},
     year = {2016},
     doi = {10.14708/am.v10i0.1545},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/am.v10i0.1545/}
}