1. Collins English Dictionary - Complete & Unabridged 10th Edition (2017), www.dictionary.com/browse/aeronautics
2. The American Heritage Science Dictionary (2017), www.dictionary.com/browse/aeronautics
3. R. Blockley, W. Shyy, Encyclopedia of Aerospace Engineering (2010)
4. V. Hubka, W.E. Eder, Theory of Technical Systems: A Total Concept Theory for Engineering Design (Springer, Berlin, 2012)
5. B. Lukasch, O. Lilienthal, Der Vogelflug als Grundlage der Fliegekunst (Springer, Berlin, 2014)