„Quinisext Council | Christianity”. Encyclopedia Britannica (на језику: енглески). Приступљено 5. 9. 2021. „"The Western Church and the Pope were not represented at the council. Justinian, however, wanted the Pope as well as the Eastern bishops to sign the canons. Pope Sergius I (687–701) refused to sign, and the canons were never fully accepted by the Western Church”
„Pentarchy | Christianity”. Encyclopedia Britannica (на језику: енглески). Приступљено 21. 9. 2021. „Pentarchy. The proposed government of universal Christendom by five patriarchal sees under the auspices of a single universal empire. Formulated in the legislation of the emperor Justinian I (527–65), especially in his Novella 131, the theory received formal ecclesiastical sanction at the Council in Trullo (692), which ranked the five sees as Rome, Constantinople, Alexandria, Antioch, and Jerusalem”
„Greek and Latin Traditions Regarding the Procession of the Holy Spirit | EWTN”. EWTN Global Catholic Television Network (на језику: енглески). Приступљено 20. 9. 2021. „The Catholic Church has refused the addition καὶ τοῦ Υἱοῦ to the formula τὸ ἐκ τοῦ Πατρὸς ἐκπορευόμενον in the Greek text of the Nicene-Constantinopolitan Symbol, even in its liturgical use by Latins”
Diehl, Charles (1923). „1: Leo III and the Isaurian Dynasty (717-802)”. Ур.: Gwatkin, Henry Melvill. The Cambridge Medieval History: The Eastern Roman empire (717-1453) (на језику: енглески). University Press. стр. 21. Приступљено 5. 9. 2021. „… Tarasius … skilfully put forward the project of an Ecumenical Council which should restore peace and unity to the Christian world. The Empress […] summoned the prelates of Christendom to Constantinople for the spring of 786. … Finally the Council was convoked at Nicaea in Bithynia; it was opened in the presence of the papal legates on 24 September 787. This was the seventh Ecumenical Council.”