@Article{231780,
     author = "Sławomir Kurek, Milena Lange",
     title = "Urbanisation and changes in fertility pattern in Poland and in the selected countries of Western and Southern Europe ",
     year =  2012,
     volume =  ,
     number =  17,
     journal =  Bulletin of Geography. Socio-Economic Series,
     pages =  s. 77-85,
    }