Constantine Porphyrogenitus
| Author(s) | Title | Reference | |
|---|---|---|---|
| C.A. Trypanis | Constantine Porphyrogenitus De Administrando Imperio, by Gy. Moravcsik, R. F. H. Jenkins | 20/, p. 94 | |
| GERVASE ROSSER | A State of Deference: Ragusa/Dubrovnik in the Medieval Centuries, by Susan Moshe Stuard | 63/2, p. 357 |