@article{400977,
      recid = {400977},
      author = {Stephenson, Paul.},
      title = {Byzantium's Balkan frontier a political study of the  Northern Balkans, 900-1204 / [electronic resource] :},
      publisher = {Cambridge University Press,},
      address = {Cambridge ;},
      pages = {xii, 352 p. :},
      year = {2000},
      url = {http://library.usi.edu/record/400977},
}