@Article{249806,
     author = "Zbigniew Długosz, Piotr Raźniak",
     title = "Population movement and changes in population in European countries - present state and perspectives ",
     year =  2008,
     volume =  ,
     number =  10,
     journal =  Bulletin of Geography. Socio-Economic Series,
     pages =  s. 21-35,
    }