{"id":"001013468","type":"book","title":"Invisible boundaries and places of power: notions of liminality and centrality in the early Middle Ages","publisher":"Brill","publisher-place":"Leiden/Boston/Köln","pages":"83-93","container-title":"The transformation of frontiers : From Late Antiquity to the Carolingians","author":[{"family":"Harrison","given":"Dick"}],"issued":{"raw":"2001"}}