A History of the Eastern Roman empire from the fall of Irene to the accession of Basil I (A.D. 802-867) - Bury, J. B. (John Bagnell), 1861-1927 (Macmillan and co., limited, 1912)
Continues on a larger scale the author's History of the later Roman empire from Arcadius to Irene, London and New York, 1889, cf. Pref.