{"id":"001175749","type":"book","title":"Die Investitur. Ein Beitrag zum Problem der 'Staatssymbolik' im Hochmittelalter","pages":"51-86","container-title":"Frühmittelalterliche Studien, 27 (1993","author":[{"family":"Keller","given":"Hagen"}],"issued":{"raw":"1993"}}