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3. G.H. Bryan, Stability and Aviation. (London: MacMillan & Co., 1911).
4. L. Bairstow, B. Melvill Jones, and F. Thompson, “Investigation into the Stability of an Airplane.” British ARC R&M, 77, 1913.
5. J.C. Hunsaker, “Experimental Analysis of Inherent Longitudinal Stability for a Typical Biplane.” NACA TR I, Pt. 1, 1915.