@Article{276539,
     author = "Mirosław J. Leszka",
     title = "„Byzantium’s Balkan Frontier. A political study of Northern Balkans, 900–1204”, Paul Stephenson, Cambridge 2000 : [recenzja] ",
     year =  2003,
     volume =  94,
     number =  2,
     journal =  Przegląd Historyczny,
     pages =  s. 211-213,
    }