ハフナー ロータバギー
↑ Charnov, Bruce. Autogiro to Gyroplane: 1923–2003. Hofstra University (as posted on the Groen Brothers Aviation web site). http://www.groenbros.com/history.php
↑ Flight 1954 p821
↑ Meekcoms/Morgan 1994, p. 306
↑ "Rotachute, Rotabuggy and Rotatank" Flying Review International Vol.19 No. 3 December 1963, Purnell & Sons Ltd page 45
↑ Zaloga p37-38
↑ "Rotachute, Rotabuggy and Rotatank" Flying Review International Vol.19 No. 3 December 1963, Purnell & Sons Ltd page 46
↑ Zaloga, Steven J. (2005). Jeeps 1941–45. Osprey Publishing. pp. 37–38. ISBN 1-84176-888-X. https://books.google.com/books?id=I_fFkOS4b_4C&pg=PA38&lpg=PA38&dq=Rotabuggy+&source=web&ots=gUKcRcQBtj&sig=tJ9T-aEYDILt_U-yXnl2aqtoRw8&hl=en#PPA38,M1