1. Mandelbrot, B.B., The Fractal Geometry of Nature, New York: W.H. Freeman, 1982.
2. Janahmadov, A.Kh. and Javadov, M.Y., Synergetics and Fractals in Tribology, Materials Forming, Machining and Tribology, Cham: Springer, 2016. https://doi.org/10.1007/978-3-319-28189-6
3. Hasegawa, M., Liu, J., Okuda, K., and Nunobiki, M., Calculation of the fractal dimensions of machined surface profiles, Wear, 1996, vol. 192, nos. 1–2, pp. 40–45. https://doi.org/10.1016/0043-1648(95)06768-x
4. Ivanova, V.S., Balankin, A.S., Bunin, I.Zh., and Oksogoev, A.A., Synergetics and Fractals in Material Science, Terent’ev, E.N., Ed., Moscow: Nauka, 1994.
5. Edgar, G.A., Measure, Topology, and Fractal Geometry, Undergraduate Texts in Mathematics, New York: Springer, 1990. https://doi.org/10.1007/978-1-4757-4134-6