Pavel Cheremukhin, "The Council of Constantinople, 1157, and Nicholas, Bishop of Methone". "At the beginning of Mai's presentation of the acts of the Council, both opinions on the main issue – subsequently recognized as heretical and Orthodox – are formulated as follows: "In the reign of Manuel Komnenos, the doctrine expressed in the words: "Thou art the Offeror, the Offered, and the One Who receives" was widely discussed. Some (The heretical party) claimed that the Sacrifice of the Cross was offered to one Father and Spirit, but by no means to the sacrificing Word Itself, saying that if the latter is allowed, then the One Son of God will be completely divided into two persons, which division was introduced by the empty-mouthed Nestorius.” Others (The Orthodox), in agreement with the words of the mentioned prayer, claimed that "the offering was also to the Son Himself, i.e., to the One and Indivisible Being of the Beginningless Trinity."" https://azbyka.ru/otechnik/Istorija_Tserkvi/konstantinopolskij-sobor-1157-goda-i-nikolaj-episkop-mefonskij/
Robert of Clari, "Account of the Fourth Crusade", 18Archived 13 February 2005 at the Wayback Machine
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Buck 2015, p. 109-15. Buck, Andrew (2015). "Between Byzantium and Jerusalem? The principality of Antioch, Renaud of Châtillon, and the penance of Mamistra in 1158". Mediterranean Historical Review. 30 (2): 107–124. doi:10.1080/09518967.2015.1117203.
McMahon 2025, p. 47-66. McMahon, Lucas (2025). "Manuel I Komnenos' policy towards the Sultanate of Rum and John Kontostephanos' embassies to Jerusalem, 1159–61". Crusades. 24 (1): 47–66. doi:10.1080/14765276.2024.2405810.
McMahon 2025, p. 49-51. McMahon, Lucas (2025). "Manuel I Komnenos' policy towards the Sultanate of Rum and John Kontostephanos' embassies to Jerusalem, 1159–61". Crusades. 24 (1): 47–66. doi:10.1080/14765276.2024.2405810.
McMahon 2025, p. 51-52. McMahon, Lucas (2025). "Manuel I Komnenos' policy towards the Sultanate of Rum and John Kontostephanos' embassies to Jerusalem, 1159–61". Crusades. 24 (1): 47–66. doi:10.1080/14765276.2024.2405810.
McMahon 2025, p. 52-53. McMahon, Lucas (2025). "Manuel I Komnenos' policy towards the Sultanate of Rum and John Kontostephanos' embassies to Jerusalem, 1159–61". Crusades. 24 (1): 47–66. doi:10.1080/14765276.2024.2405810.
McMahon 2025, p. 53-57. McMahon, Lucas (2025). "Manuel I Komnenos' policy towards the Sultanate of Rum and John Kontostephanos' embassies to Jerusalem, 1159–61". Crusades. 24 (1): 47–66. doi:10.1080/14765276.2024.2405810.