http://www.metmuseum.org/toah/hd/cube/hd_cube.htm

http://www.artyfactory.com/art_appreciation/art_movements/cubism.htm

http://www.ibiblio.org/wm/paint/auth/hockney/

http://web.archive.org/web/20071119143000/

http://www.mcs. csuhayward.edu/~malek/Hockney.html

http://www.olejarz.com/art/bigpicture/index.html

http://www.bbc.co.uk/dna/h2g2/A449921

http://nga.gov.au/Hockney/index.cfm

http://blakeandrews.blogspot.com/2008/01/hockney-on-photography

http://findarticles.com/p/articles/mi_m1310/is_/ai_6354424 article

http://www.guardian.co.uk/media/2004/mar/04/pressandpublishing.arts