@article{10_4064_am_9_4_315_324,
     author = {J. Perkal},
     title = {O dyskryminacji p{\l}askiej},
     journal = {Applicationes Mathematicae},
     pages = {315--324},
     publisher = {mathdoc},
     volume = {9},
     number = {4},
     year = {1966},
     doi = {10.4064/am-9-4-315-324},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/am-9-4-315-324/}
}