A. A. Bobylov - Ph.D. (Phis-Math.), Associate Professor, Senior Research Scientist, Institute of Geotechnical Mechanics named by N.S. Polyakov (Ukraine, Dnepropetrovsk). E-mail: abobylov@gmail.com
I. S. Belashova - Dr.Sc. (Eng.), Professor, Moscow Aviation Institute (National Research University). E-mail: irina455@inbox.ru