(en) David Myhra, Messerschmidts Over America Part 2, RCW Technology & Ebook Publishing, , 46p. (lire en ligne).
(en) Berend G. van der Wall, Göttinger Monograph N: German Research and Development on Rotary-Wing Aircraft (1939–1945), American Institute of Aeronautics and Astronautics, Inc., , 227p. (ISBN978-1-62410-272-1, lire en ligne).