http://www.artic.edu/aic/collections/exhibitions/Lichtenstein
_ Whaam! Roy Lichtenstein at Tate Modern
https://youtu.be/Iuxl2-XxPFs
_ Roy Lichtenstein: the art and the artist
https://youtu.be/f1s-nAijk_g
_ "Roy Lichtenstein: A Retrospective" at the National Gallery
https://youtu.be/eGqStiwh618
