& Kaegi, W. E. (1993). Byzantine Bureaucracy and Specific Features of Byzantine State Structure: Ed. by Walter E. Kaegi. Hakkert.

and Walter Emil Kaegi. Byzantine Bureaucracy and Specific Features of Byzantine State Structure: Ed. by Walter E. Kaegi. Amsterdam: Hakkert, 1993.

and Walter Emil Kaegi. Byzantine Bureaucracy and Specific Features of Byzantine State Structure: Ed. by Walter E. Kaegi. Hakkert, 1993.