en
The Cambridge Medieval History - Book XVI - The Decline and Fall of the Eastern Roman Empire
William Miller, Charles Diehl Diehl, Edwin Pears, Louis Brehier, Herbert Loewe, Paul Collinet
en
The Cambridge Medieval History - Book XV - The Eastern Roman Empire from Isaac I to Andronicus
William Miller, Thomas Arnold, Charles Kadlec, Louis Brehier, Ferdinand Chalandon
