http://www.brainyquote.com/quotes/quotes/r/roylichten317282.html
http://en.wikipedia.org/wiki/James_Gill_(artist)
http://www.edwardhopper.net
http://www.biography.com/people/roy-lichtenstein-9381678
http://en.wikipedia.org/wiki/James_Rosenquist
http://en.wikipedia.org/wiki/Andy_Warhol