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2. Ragab, S. "Linear Instability Waves in SupersonicTurbulent MixingLayers,"AlAA paper 87-1418.
3. The instability and acoustic wave modes of supersonic mixing layers inside a rectangular channel
4. Samimy, M., Erwin, D. and Elliott, G. "Compressibility and Shock Wave Interaction Effectson Free Shear Layers," AlAA Paper 89-2460.