TY JOUR TI SUBSTANTIATION OF THE TECHNOLOGY OF WOOD HARVESTING WITH THE HELP OF IMI-TATION MODELING ON PETRI NET KW harvesting KW logging machine systems KW harvester KW forwarder KW simulation KW Petri nets JO Forestry Engineering Journal PY 2018 IS 8 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov