Lavin, Irving, “The Story of O from Giotto to Einstein (Excerpt)," Bildwelten des Wissens. Kunsthistorisches Jahrbuch für Bildkritik, I, 2, 2003, 37-43. Italian translation in Lavin, L’arte della storia dell’arte, Milan, 2008, 36-41. Updated English version (unpublished), 2014.