1. G. G. Suraj, G. M. Mangesh, and P. M. Jawandhiya, “Review of Unmanned Aircraft System (UAS)," Intern. J. Adv. Res. Comput. Engng Technol. 2 (4), 1646–1658 (2013).
2. A. C. Watts, V. G. Ambrosia, and E. A. Hinkley, “Unmanned Aircraft Systems in Remote Sensing and Scientific Research: Classification and Considerations of Use," Remote Sens. 4, 1671–1692 (2012).
3. A. G. Korchenko and O. S. Ilyash, “Generalized Classification of Unmanned Aircraft Systems," Zb. Nauk. Prats Kharkiv. Un-tu Povitryan. Sil, No. 4, 27–36 (2012).
4. H. Penner and F. Herzog, Faszination Ultraleichtfliegen (Motorbuch Verlag, Stuttgart, 2011).
5. H. Schlichting, Boundary Layer Theory, McGraw-Hill, New York (1979).