1982: continued

• Generalizes to three-dimensional, compressible boundary layers (Van Dommelen & Cowley 1990).
• Knowledge about the subsequent evolution is limited. (K. W. Cassel, F. T. Smith, and J.D.A. Walker 1996)
• (See http://www.math.temple.edu/ hej/ for movies by Johnston, Liu, & E).

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