1 2 3 4 5 6 7 Detlev Schwennicke, Europäische Stammtafeln: Stammtafeln zur Geschichte der Europäischen Staaten, Neue Folge, Band II (Marburg, Germany: J. A. Stargardt, 1984), Tafel 5
↑ Richard Mylius Sherman, The Ghents: A Flemish Family in Norman England, UMI Dissertation Information Service, Ann Arbor, MI (1988), p. 214
↑ David Nicholas, Medieval Flanders ( New York: Longman, 1992), p. 48
↑ Heather J. Tanner, Families, Friends, and Allies: Boulogne and Politics in Northern France and England, c. 879-1160 (Leiden; Boston : Brill, 2004), p. 83
1 2 3 4 5 6 Eljas Oksanen, Flanders and the Anglo-Norman World, 1066-1216 (Cambridge: Cambridge University Press, 2012), p. 11
1 2 Renée Nip, 'The Political Relations Between England and Flanders (1066-1128), Anglo-Norman Studies XXI: Proceedings of the Battle Conference 1998, ed. Christopher Harper-Bill (Woodbridge: Boydell Press, 1999), pp. 146-47
1 2 3 4 Renée Nip, 'The Political Relations Between England and Flanders (1066-1128), Anglo-Norman Studies XXI: Proceedings of the Battle Conference 1998, ed. Christopher Harper-Bill (Woodbridge: Boydell Press, 1999), p. 147
↑ Jean Dunbabin, France in the Making 843-1180, Second Edition (Oxford; New York: Oxford University Press, 2005), p. 209
1 2 David C. Douglas, William The Conqueror(Berkeley; Los Angeles: University of California Press, 1964), p. 76
↑ Renée Nip, 'The Political Relations Between England and Flanders (1066-1128), Anglo-Norman Studies XXI: Proceedings of the Battle Conference 1998, ed. Christopher Harper-Bill (Woodbridge: Boydell Press, 1999), p. 145
