Bury 1912, p. 82 Bury, J. B. (1912). A History of the Eastern Roman Empire from the Fall of Irene to the Accession of Basil I (A. D. 802–867). Londres: MacMillan. OCLC1903563
Bury 1912, p. 84 Bury, J. B. (1912). A History of the Eastern Roman Empire from the Fall of Irene to the Accession of Basil I (A. D. 802–867). Londres: MacMillan. OCLC1903563
Bury 1912, pp. 144, 159 Bury, J. B. (1912). A History of the Eastern Roman Empire from the Fall of Irene to the Accession of Basil I (A. D. 802–867). Londres: MacMillan. OCLC1903563