Gibbon, Edward (1788–89). "Chapter LX: The Fourth Crusade". The History of the Decline and Fall of the Roman Empire. Vol.VI. London: Strahan & Cadell. Pemeliharaan CS1: Format tanggal (link)
Harris, Jonathan, 'Collusion with the infidel as a pretext for military action against Byzantium', in Clash of Cultures: the Languages of Love and Hate, ed. S. Lambert and H. Nicholson, Turnhout: Brepols, 2012, pp.99–117. ISBN 978 2503 520643
Van Tricht, F., The Latin Renovatio of Byzantium: The Empire of Constantinople (1204-1228), Leiden: Brill, 2011
Moore, John C. (January 1962), "Baldwin IX of Flanders, Philip Augustus and the Papal Power", Speculum, 37 (1), Medieval Academy of America: 79–89, doi:10.2307/2850600, JSTOR2850600.
Wolff, Robert Lee (July 1952), "Baldwin of Flanders and Hainaut, First Latin Emperor of Constantinople: His Life, Death, and Resurrection, 1172–1225", Speculum, 27 (3), Medieval Academy of America: 281–322, doi:10.2307/2853088, JSTOR2853088.
