1. C. Miliani, F. Rosi, I. Borgia, P. Benedetti, B.G. Brunetti, A. Sgamellotti, Appl. Spectrosc. 61, 293 (2006)
2. B.G. Brunetti, C. Seccaroni, A. Sgamellotti, The Painting Technique of Pietro Vannucci, called the Perugino (Nardini Editore, Rome, 2004)
3. A. Roy, M. Spring, Raphaels Painting Technique: Working Practices before Rome (Nardini Editore, Rome, 2006)
4. M. Bacci, A. Casini, C. Cucci, M. Picollo, B. Radicati, M. Vervat, J. Cult. Herit. 4, 329 (2003)
5. F. Zieske, The Book and Paper Group Annual 14 (Washington AIC Book and Paper Group Annual, 1995), p. 105