↑ Entry on "Cupid," The Classical Tradition (Harvard University Press, 2010), p. 245; Stefania Macioe, "Caravaggio and the Role of Classical Models," in The Rediscovery of Antiquity: The Role of the Artist (Collegium Hyperboreum, 2003), pp. 437–438.
↑ Rona Goffen (2004). Renaissance rivals: Michelangelo, Leonardo, Rafael, Titian. Yale University Press. tr. 409, note 83.
↑ Deborah Parker, Michelangelo and the Art of Letter Writing (Cambridge University Press, 2010), p. 11; Rona Goffen, Renaissance Rivals: Michelangelo, Leonardo, Raphael, Titian (Yale University Press, 2002, 2004), p. 95.
↑ Umberto Baldini, Michelangelo scultore, Rizzoli, Milano 1973, pp. 90-91.
