TY JOUR TI Features of development windfall burelomnykh cutting areas KW wind-fallen cutting area KW technology KW criteria KW machine system KW efficiency JO Actual directions of scientific researches of the XXI century: theory and practice AU Protas, P.. AU Fedorenchik, A.. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov