1. Bynoe D. Drawing Machine. http://dbynoe.blogspot.ca/2012/09/drawing-machine.html. Bynoe D. Drawing Machine. http://dbynoe.blogspot.ca/2012/09/drawing-machine.html.
2. hui Liao J. Self-Portrait Machine. http://www.jenhui-liao.com/selfportraitmachine/. hui Liao J. Self-Portrait Machine. http://www.jenhui-liao.com/selfportraitmachine/.
3. Pegasus