00669naa#a2200181#i#450# EN\\bibl\8299 20260328023415.6 2308-8877 20151210b2015####ek#y0engy0150####ca RUS RU The determination of the kinetic energy--of machine and tractor units for the study of motion using Lagrange equations of the second kind Journal article Voronezh FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov 2015 7 с. Journal article local Veliev Nazim Veliev Ramil naukaru.ru