TY JOUR TI To the question about the need to develop a unified chipper KW chipping machines KW wood KW dynamic calculation JO Actual directions of scientific researches of the XXI century: theory and practice AU Sivakov, V.. AU Luporeva, I.. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov