Makk, Ferenc (1989). The Árpáds and the Comneni: Political Relations between Hungary and Byzantium in the 12th century (Translated by György Novák). Akadémiai Kiadó.
ISBN963-05-5268-X.
Stephenson, Paul (2000). Byzantium's Balkan Frontier: A Political Study of the Northern Balkans, 900–1204. Cambridge University Press.
ISBN978-0-521-02756-4.
Makk, Ferenc (1989). The Árpáds and the Comneni: Political Relations between Hungary and Byzantium in the 12th century (Translated by György Novák). Akadémiai Kiadó.
ISBN963-05-5268-X.
Stephenson, Paul (2000). Byzantium's Balkan Frontier: A Political Study of the Northern Balkans, 900–1204. Cambridge University Press.
ISBN978-0-521-02756-4.