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4. I. Tani, ?Effect of two-dimensional and isolated roughness on laminar flow,? Boundary Layer and Flow Control, Vol. 2, Pergamon Press, Oxford (1961), p. 637.
5. A. E. Doenhoff and A. L. von Braslow, ?The effect of distributed surface roughness on laminar flow,? Boundary Layer and Flow Control, Vol. 2, Pergamon Press, Oxford (1961), p. 657.