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2. H.E. Stanley and N. Ostrowski (eds.). On Growth and Form: Fractal and Non-Fractal Patterns in Physics (Martinus Nijhof, Dordrecht, 1986).
3. L. Pietronero and E. Tosatti (eds.). Fractals in Physics (North-Holland, Amsterdam, 1986).
4. H.E. Stanley and N. Ostrowski (eds.). Random Fluctuations and Pattern Growth (Kluwer, Dordrecht, 1988).
5. J. Feder, Fractals (Pergamon, New York, 1988).