1. Challenges Facing Future Micro-Air-Vehicle Development
2. SchmitzF. W. “Aerodynamics of the Model Airplane. Part I. Airfoil Measurements,” U.S. Army Missile Command, Redstone Scientific Information Center, Alabama, Nov. 1967 (Translated from German), p. 17 (in German).
3. Review of Historic and Modern Cyclogyro Design
4. FoshagW. F.BoehlerG. D. “Review and Preliminary Evaluation of Lifting Horizontal-Axis Rotating-Wing Aeronautical Systems (HARWAS),” U. S. Army Aviation Materiel Laboratories Fort Eustis USAAVLABS TR 69-13, Virginia, March 1969, p. 123.
5. WheatleyJ. B. “Simplified Aerodynamic Analysis of the Cyclogiro Rotating-Wing System,” NACA TN-467, Aug. 1933, p. 2.