TY JOUR TI Energy saturation in the focus of skidding enhancement problem KW skidding KW wheeled machinery KW energy saturation JO Actual directions of scientific researches of the XXI century: theory and practice AU Ustinov, V.. AU Khakhina, A.. PY 2015 IS 3 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov