1. B.B. Mandelbrot, Fractals (Freeman, San Francisco, 1977); The Fractal Geometry of Nature (Freeman, San Francisco, 1982).
2. R. Jullien and R. Botet, Aggregation and Fractal Aggregates (World Scientific, Singapore, 1987).
3. J. Feder, Fractals (Plenum, New York, 1988).
4. A.-L. Barabási and H.E. Stanley, Fractal Concepts in Surface Growth (University Press, Cambridge, 1995).
5. M.V. Berry, “Difractals,” J. Appl. Phys.
12, 781–797 (1979).