1. Chipp, H.B.: Theories of Modern Art (A Source Book by Artists and Critics). California Studies in the History of Art (1996)
2. http://www.circlism.com
3. http://benheine.deviantart.com/gallery/30782139/
4. http://www.flickr.com/photos/benheine/sets/72157623553428960
5. http://www.trendhunter.com/trends/ben-heine1