1. N. Serdyukova and V. Serdyukov, Theory and Practice, Intelligent Systems Reference Library (Springer Nature, Switzerland) 191 (2021).
2. A. I. Malt’sev, Algebraic Systems (Nauka, Moscow, 1970).
3. N. Serdyukova and V. Serdyukov, Theory and Practice, Smart Innovation, Systems and Technologies (Springer Nature, Switzerland) 91 (2018).
4. B. Mandelbrot, The Fractal Geometry of Nature (W.H. Freeman, San Francisco, 1983).
5. I. R. Shafarevich, Basic Concepts of Algebra (Izhevsk Republican Printing House, Izhevsk, 1999).