{{Cite| publisher = BRGM - Service géologique national| last1 = Le Berre| first1 = Patrick| last2 = Schroetter| first2 = Jean-Michel| last3 = Tartese| first3 = R.| last4 = Trotin| first4 = G.| title = Carte géol. France (1/50 000), feuille Guer (352)| location = Orléans| series = Carte Géol. France (1/50 000)| date = 2009}}