1. Campbell, J. P. and McKinney, M. O. "A Study of the Problem of Designing Airplanes with Satisfactory Inherent Damping of the Dutch Roll Oscillation,"NACAReport1199,1954.
2. Johnson, H. I. "Flight Investigation of the Effect of Various Vertical-Tail Modifications on the Directional Stability and Control Characteristics of a Propeller-Driven Fighter Airplane," NACA Report973,1950.
3. Enhanced Aerofoil Performance Using Small Trailing-Edge Flaps
4. Storms, B. L. and Jang, C. S. "Lift Enhancement of an Airfoil Using a Gurney Flap and Vortex Generators,"AIAA Paper93-0647,January1993.
5. Design of Subsonic Airfoils for High Lift