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4. Bakker, P.G. (1984) Structural stability and bifurcation in conical flow fields. Delft University of Technology, Report LR-424.
5. Bakker, P.G. and Reyn, J.W. (1985) Conical flow near external axial corners as a bifurcation problem. AIAA-Journal, Vol. 23, No. 1.