1. 'Pretsch,J. "The Excitation of Unstable Perturbations ina Laminar Friction Layer,"NACA Tech.Mem. 1343, Sept. 1952,originally published in Jahrbuch der deutschen Luftfahrtforschung, Aug. 1942.
2. •^Obremski, H.J.,Morkovin, M. V., and Landahl, M. "A Portfolio of Stability Characteristicsof IncompressibleBoundary Layers,"AGARDograph 134, Mar. 1969.
3. Accurate solution of the Orr–Sommerfeld stability equation
4. Boundary layer stability calculations