1. 2Mandelbrot, B. B., The Fractal Geometry of Nature, W. H. Freeman, New York, 1983, pp.74-83.
2. Manchester, F. W., Aerodynamics, 2nd ed.Constable, London, 1909, pp.175-178.
3. 4Prandtl, L. and Tietjens, O. G., Applied Hydro- and Aeromechanics, Dover, New York, 1957, pp.185-197.