TY JOUR TI MATHEMATICAL MODEL OF THE SOIL STRESS-STRAIN STATE IN THE PROCESS OF ITS INTERACTION WITH THE WORKING BODIES OF THE DIGGING MACHINE KW JO Forestry Engineering Journal AU Dornyak, O.R. AU Drapalyuk, M.V. AU Kazakov, I.V. AU Orudzhov, E.S. PY 2019 IS 9 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov