{{Cite conference| publisher = BRGM - Service géologique national| last1 = Thomas| first1 = Éric| last2 = Outin| first2 = Jean-Marie| last3 = Rivière| first3 = Jean-Marie| last4 = Blanchet| first4 = Serge| last5 = Carn| first5 = Anne| title = Notice explicative de la feuille 316 - Montfort-sur-Meu| location = Orléans| series = Carte géol. France (1/50 000)| date = 1999}}