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2. The Energy Method, Stability, and Nonlinear Convection;Straughan,1992
3. Hydrodynamic Stability;Drazin,1981
4. Bounds on flow quantities;Howard;Annu. Rev. Fluid Mech.,1972
5. The optimum theory of turbulence;Busse;Adv. Appl. Mech.,1978