{"id":"001013474","type":"book","title":"The creation of the Carolingian frontier system c","publisher":"Brill","publisher-place":"Leiden/Boston/Köln","pages":"233-245","container-title":"The transformation of frontiers : From Late Antiquity to the Carolingians","author":[{"family":"Wolfram","given":"Herwig."}],"issued":{"raw":"2001"}}