Michael Psellus, Chronographia, also published under the title Fourteen Byzantine Rulers, ed. E.R.A. Sewter. London 1953. [English translation, Full online text
Nestor, The Russian Primary Chronicle: Laurentian Text,, Samuel Hazzard Cross, Olgerd P. Sherbowitz-Wetzor, Published by Mediaeval Academy of America, 1953
Nguồn thứ cấp
Penelope Delta, The Age of the Bulgar-slayer (In Greek), 1911, ESTIA Publishing Co
George Finlay, (1856), History of the Byzantine Empire from DCCXVI to MLVII, 2nd Edition, Published by W. Blackwood.
Holmes, Catherine (2005). Basil II and the Governance of Empire (976–1025). New York: Oxford University Press. ISBN0199279683.