Blackburn, Ken. "Paper Plane Aerodynamics". Ken Blackburn's Paper Airplanes. Archived from the original on 1 October 2012. Retrieved 8 October 2012. Section 4.3
Blackburn, Ken. "Paper Plane Aerodynamics". Ken Blackburn's Paper Airplanes. Archived from the original on 1 October 2012. Retrieved 8 October 2012. Section 4.3