Andreenkov, Evgeniy, <em>Smolensk branch of National Research University "MPEI"</em><textarea id="BFI_DATA" style="width: 1px; height: 1px; display: none;"></textarea> <textarea id="BFI_DATA" style="width: 1px; height: 1px; display: none;"></textarea> <div id="WidgetFloaterPa, Russian Federation