  Computer modeling of the VRH conductivity in the two-dimensional system has
been done by kinetic Monte Carlo method, which includes some new elements.
Study of the temperature dependence of the conductivity, testing of the
different scaling relations, and study of the size effect show that the
Efros-Shklovskii mechanism of the VRH is valid in the slightest details. It has
been also shown that simultaneous transitions of many electrons are not
important.
  The reasons of disagreement with previous works are thoroughly analyzed.
