{{Cite book| publisher = Impr. de L. Prud'homme| last = Ropartz| first = Sigismond| title = La Famille Descartes en Bretagne| location = Saint-Brieuc| access-date = 2015-04-01| date = 1876| url = http://gallica.bnf.fr/ark:/12148/bpt6k5526407w}}