The book De Administrando Imperio ("On the Governance of the Empire"), written in the 10th century, is the most referenced source on the migration of Slavic peoples into southeastern Europe.
10. sajandil kirjutatud raamat De Administrando Imperio ("Impeeriumi valitsemisest") on enim viidatud allikas slaavi rahvaste rändest Kagu-Euroopasse.