Book: Hersey, George Léonard (1988). The Lost Meaning of Classical Architecture:Speculations on Ornament from Vitruvius to Venturi. London, England : The MIT Press ; First Soft Cover Edition. p.135
Article in Journal: Yves, Pauwels (2012), “Architectura von Ausstheilung…”. Archtecvra (Architecture, textes et images, XVIe-XVIIe siècle). Books on architecture.