Geneweb Website, online <http://geneweb.inria.fr/roglo?lang=en>. Hereinafter cit...

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Geneweb Website, online <http://geneweb.inria.fr/roglo?lang=en>. Hereinafter cited as Roglo Geneweb Website. From the Familypedia page on Robert de Vermandois: http://familypedia.wikia.com/wiki/Robert_de_Vermandois_%28918-968%29. Cited by Darryl Lundy, The Peerage.

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