found:Speck, P. Kaiser Konstantin VI, 1978 (subj.)t.p. (Kaiser Konstantin VI) p. 53 (b. 14 Jan. 771) p. 307 ff. (blinded and deposed in 797, seems to have died the same year)
found:Enc. Brit.,v. 3, 1978 (Constantine VI ruled under the regency of the empress Irene during the age of iconoclasm, blinded and deposed in 797)
found:Brockhaus Enz., 1967 under Herrscher von Byzanz(Konstantin VI, 780-797)
found:Fuentes Alonso, J.A. El divorcio de Constantino VI y la doctrina matrimonial ... 1984.
found:Risālat Abī al-Rabīʻ Muḥammad ibn al-Layth ... 2006:t.p. (Qusṭanṭīn malik al-Rūm)
notfound:Pauly Realenzyklopädie;Potthast.