1. [1] United States Civil Aeronautics Administration, “A Selected and Annotated Bibliography of Recent Air Age Education Textbooks,” 1947.
2. [2] J. P. Fielding, Introduction to Aircraft Design. Cambridge University Press, 1999.
3. [3] K. P. Valavanis and G. J. Vachtsevanos, Handbook of unmanned aerial vehicles. Springer Netherlands, 2015.
4. [4] J. M. Forshaw, Encyclopaedia of Animals: Birds. Murdoch Books UK, 1991.
5. [5] H. Hertel, Struktur, Form, Bewegung. Mainz: Krauskopf-Verlag, 1963.