{"id":"001190429","type":"book","title":"Zum Problem des Verhältnisses Burg-Grenze in Sachsen während des Mittelalters","pages":"8-38","container-title":"Burgenforschung aus Sachsen, 5/6 (1995","author":[{"family":"Billig","given":"Gerhard."}],"issued":{"raw":"1995"}}