Olga M. Druzhinina, Associate Professor, Department of Modeling of Physical Processes and Systems, School of Natural Sciences, University of Tyumen, Tyumen, Russia; o.m.druzhinina@utmn.ru
Aleksandr A. Kudryavtsev, Cand. Sci. (Phys.-Math.), Analytic, Agrobiotechnology Center, Northern Trans-Ural State Agricultural University (Tyumen); kudrphys55@mail.ru