Archivum Eurasiae Medii Aevi (en). Otto Harrassowitz, 1984 — 56-bet. „Georgia, under Bagrat IV (1027–1072), felt itself threatened by both the nomads and Byzantium and faced tremendous problems in reconciling the haughty Transcaucasian Christian nobility to the need for a strong, centralizing monarchy.“
Head, Barclay Vincent. The Numismatic Chronicle (en). Royal Numismatic Society., 1958 — 141-bet. „Bagrat IV was promoted to the title of Sebastos in 1060“
