http://erau.edu/er/newsmedia/newsreleases/2002/airforce.html

http://www.diamond-air.at/en/press/pressarchive/21111.htm

http://www.findarticles.com/p/articles/mi_m0IBP/is_2_47/ai_98542399

http://flighttraining.aopa.org/learntofly/articles/diamond0308.cfm