{{Cite book| edition = Société d'histoire et d'archéologie de Bretagne| publisher = Presses Universitaires de Rennes| last1 = Guillotel| first1 = Hubert| last2 = Guigon| first2 = Philippe| last3 = Henry| first3 = Cyprien| last4 = Jones| first4 = Michael| last5 = Keats-Rohan| first5 = Katharine| last6 = Meuret| first6 = Jean-Claude| last7 = Plessix-Buisset| first7 = Christiane| title = Les actes des ducs de Bretagne (944-1148)| date = 2014}}