References for Edward I. Duke, 2nd Duke, Earl of Norwich * d'Aumale * of York * of Cambridge

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J. Dupont, J. Saillot: Cahiers de Saint-Louis. Nantes, Angers, 1976 etc.
H. Grote: Stammtafeln. Leipzig, 1877
M.A.H., Marquis de Ruvigny: The Plantagenet roll of the blood royal, Essex Volume. London, Edinburgh, 1908
D.Schwennicke: Europäische Stammtafeln, Vol. II, Tafel 86. Marburg, 1984