1. Observing art, med students learn art of observation. Berger L. New York Times, Jan. 2, 2001: D5.
2. Blink: the power of thinking without thinking;Malcolm Gladwell,2005
3. Le Déjuner Sur L'herbe (The luncheon on the grass). Eduard Manet. This image was obtained from The Web Museum, Paris, at http://www.ibiblio.org/wm/paint/auth/manet/dejeuner/, with the original to be seen at Musée d'Orsay, Paris, France.
4. Manual of skin diseases,1996
5. John Gould the bird man: correspondence 1852 through 1857,2003