1. Adams, A. (2011). [visited December 2011].
2. Alberti, L. B. (1435). Della Pittura. Book I. (Numerous editions and translations available.).
3. Art and visual perception: A psychology of the creative eye;Arnheim,1974
4. The success and failure of Picasso;Berger,1989
5. An essay towards a new theory of vision;Berkeley,1709