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2. Van Driest, E. R.: Turbulent Boundary Layer in Compressible Fluids. Jour. Aero. Sci., Vol. 18, No. 3, March, 1951.
3. Nikuradse, J.: Gesetzmäßigkeiten der turbulenten Strömung in glatten Rohren, VDI Forschungsheft 356, 1932.
4. von Kármán, Th.: The Analogy Between Fluid Friction and Heat Transfer. Trans. ASME, Vol. 61, No. 11, November, 1939.
5. Schubauer, G. B., and Klebanoff, P. S.: Investigation of Separation of the Turbulent Boundary Layer. NACA TN 2133, August, 1950.