Fig. 5/6. URL: http://www.presenhuber.com/en/artists/AITKEN_DOUG/available-works/slideshow.0d7f7e76-3ba4-4b41-98b1-c21ff3984579.4.html (12.08.2013).
Source: Fig. 5/6. URL: http://www.presenhuber.com/en/artists/AITKEN_DOUG/available-works/slideshow.0d7f7e76-3ba4-4b41-98b1-c21ff3984579.4.html (12.08.2013).