Source: https://www.researchgate.net/profile/Antoine_Picon/publication/280046413_Un_rationalisme_hante_Notes_sur_la_pensee_structurelle_de_Viollet-le-Duc/links/5803a8a808ae1c5148d09a17/Un-rationalisme-hante-Notes-sur-la-pensee-structurelle-de-Viollet-le-Duc.pdf