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3. Advanced Pogo stability analysis for liquid rockets
4. 5Nickerson, G. R., Culick, F. E. C., and Dang, A. L. "Solid Propellant Rocket Motor PerformanceComputer Program (SPP), Version6.0,"AirForceAstronauticsLab.,EdwardsAir Force Base,CA,TR-87-078,Dec.1987.