· Online. Theories of Flight. 12/1/03. http://www.centennialofflight.gov/essay_cat/9.htm.
· Online. Historical Notes. 12/1/03.http://www.desktopaero.com/appliedaero/intro/history.html.
· Online. Advanced Topics in Aerodynamics. 12/1/03. http://aerodyn.org/.
· Online. Aerodynamics at a Glance. 12/7/03. http://www.urbana.k12.oh.us/HSzab/Physics/seigenthalerf/seigenthaler.htm
· Online. DLR Research. 12/7/03. http://www.sm.go.dlr.de/
· Online. Particle Tracking in Turbulence. 12/7/03. http://milou.msc.cornell.edu/lay_turb.html.