TY JOUR TI DETERMINING THE CONTACT SPOT OF ULTRA-LOW PRESSURE TIRES 1020X420-18 BEL-79 FOR SMALL-CLASS FORESTRY EQUIPMENT KW ultra-low pressure tire KW tire deformation KW contact spot KW machine patency JO Actual directions of scientific researches of the XXI century: theory and practice AU Artyomov, A.V. AU Goncharenko, S.V. AU Pryadkin, V.I. PY 2020 IS 8 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov