| J.M. Wallace-Hadrill |
The medieval Hungarian historians: a critical and analytical guide, by C. A. Macartney |
|
23/1, p. 61 |
| C.A. Macartney |
The Entry of the Slavs into Christendom, by A. P. Vlasto |
|
40/1, p. 90 |
| C.A. Macartney |
Constantine Porphyrogenetos: De Administrando Imperio, by G. Dvornik, B. Lewis, Gy. Moravcsik, D. Obolensky, S. Runciman |
|
31/2, p. 157 |
| Anthony Gervase Mathew |
The Byzantine Commonwealth: Eastern Europe 500-1453, by Dimitri Obolensky |
|
42/3, p. 302 |