@Article{2874,
     author = "Daniela Szymańska, Stefania Środa-Murawska, Kamila Świderska, Czesław Adamiak",
     title = "Internal migration in Germany in 1990 and 2005 ",
     year =  2009,
     volume =  ,
     number =  12,
     journal =  Bulletin of Geography. Socio-Economic Series,
     pages =  s. 109-120,
    }