Echeverri Guzmán, Alberto. “One Council, Two Popes, Three Patriarchs: The Last Belated Ecumenical Endeavor Between East and West”. Revista Guillermo de Ockham 19, no. 2 (October 5, 2021): 339–354. Accessed November 22, 2024. https://revistas.usb.edu.co/index.php/GuillermoOckham/article/view/5288.