References for Blanche of Lancaster
Sir B.Burke:
Burke's Peerage and Baronetage.
London, 1999
J. Dupont, J. Saillot:
Cahiers de Saint-Louis.
Nantes, Angers, 1976 etc.
D.Schwennicke:
Europäische Stammtafeln, Vol. II, Tafel 83.
Marburg, 1984