1. See, for example, C. C. Lin,The Theory of Hydrodynamic Stability(Cambridge University Press, London, 1955), p. 11.
2. Stability of Inviscid Plane Couette Flow
3. A SIMPLIFYING TECHNIQUE IN THE SOLUTION OF A CLASS OF DIFFRACTION PROBLEMS
4. cf. also B. Noble,Methods Based on the Wiener-Hopf Technique for the Solution of Partial Differential Equations(Pergamon Press, New York, 1958), Chap. 2, p. 52.
5. N. I. Muskhelishvili,Singular Integral Equations(P. Noordhoff, Groningen, 1953), p. 35.