TY JOUR TI Increase of ecological efficiency of silvicultural production KW sustainable forest management KW eco-efficiency KW energy consumption of production KW the quality of the process JO Actual directions of scientific researches of the XXI century: theory and practice AU Grigorev, I.. AU Grigoreva, O.I. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov