Galbert (de Bruges), The Murder, Betrayal, and Slaughter of the Glorious Charles, CountofFlanders, transl. John Jeffrey Rider, (Yale University Press, 2013)
Marion. Eleanor of Aquitaine: A Biography. New York: Hawthorn Books. 1977. ISBN 0-8015-2231-5. Moore, John C. Count Baldwin IX ofFlanders, Philip Augustus
1214年初,奥托四世、英格蘭國王約翰、佛兰德伯爵费迪南德(英语:Ferdinand, CountofFlanders)、達馬爾坦伯爵雷諾(英语:Renaud de Dammartin)、布拉班特公爵亨利、荷蘭伯爵威廉、洛林公爵蒂埃博(英语:Theobald I, Duke of Lorraine)和林堡公爵亨利等人組建反腓力·奧
Charles W. The Claim of King Henry I to Be Called Learned. Taylor, C. H.; LaMonte, J. L (编). Anniversary Essays in Medieval History by Students of Charles