The Codex Huygens and Leonardo da Vinci's art theory. The Pierpont Morgan Library, Codex M.A. 1139 - Panofsky, Erwin 1892-; Pierpont Morgan Library. New York. (London The Warburg Institute, 1940)
Keywords: Leonardo da Vinci -- 1452-1519.; Huygens, Constantijn, heer van Zuilichem -- 1628-1697. Perspective