1. Matranga,G.J.,Analysis ofX-15 Landing Approachand Flare Characteristics Determined fromthe First30 Flights,NASATN-D-1057,July1961.
2. AshkenasI.L.,H.R. Jex,andD.T.McRuer,Pilot-InducedOscillations:TheirCausesand Analysis, Northrop-Norair Rept.,NOR64-143,June1964.
3. McPherson,T. M., and LT E. J.Hogan,Jr.,LowAltitudeHigh Speed FlightEvaluationoftheF-4A/B(F4H-1F/-1)Airplane, NATC-RAD32-103,2April1963.