@Article{178570,
     author = "Daniela Szymańska, Stefania Środa-Murawska, Jadwiga Biegańska",
     title = "Germany - two demographically different states? ",
     year =  2008,
     volume =  ,
     number =  10,
     journal =  Bulletin of Geography. Socio-Economic Series,
     pages =  s. 85-91,
    }