%0 Journal Article %T MATHEMATICAL MODELING OF THE DYNAMIC INTERACTION OF FOREST MACHINES AND SKIDDER SYSTEMS WITH THE SOIL WHEN WORKING ON SLOPES %A Kalyashov, V.A. %A Shapiro, V.Y. %A Grigor'ev, I.V. %A Kunitskaya, O.A. %A Grigoreva, O.. %K forests on slopes, logging operations, skidding, soils, forests on permafrost %J Forestry Engineering Journal %D 2022 %N 12 %P 13 %I FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov