{"id":"003006188","type":"article","title":"Rex or Imperator? Kalojan's Royal Title in the Correspondence with Innocent III","publisher":"Lodz University Press","publisher-place":"Lodz","pages":"171-185","container-title":"Studia Ceranea, 9, (2019","author":[{"family":"Francesco Dall'Aglio"}],"issued":{"raw":"2019"}}