1. The effect of staggering a biplane;Norton,1921
2. An experimental and theoretical analysis of the aerodynamic characteristics of a biplane-winglet configuration;Gall,1984
3. L. Prandtl, Tragflügeltheorie, 1918.
4. A. Pope, Basic wing and airfoil theory (No Title), 1951.
5. Aerodynamic characteristics of dragonfly wing sections compared with technical aerofoils;Kesel;J. Exp. Biol.,2000