{"id":"002038733","type":"article","title":"Defending the frontier or keeping up with the neighbours?","publisher":"Europäisches Burgeninstitut","publisher-place":"Braubach","pages":"18-28","container-title":"Burgen und Schlösser, 62,1 (2021","author":[{"family":"Purton","given":"P. F."},{"family":"Krauskopf","given":"Christof"}],"issued":{"raw":"2021"}}