@article{Veliev2015the,
author={Veliev, N.. and Veliev, R..},
title={The determination of the kinetic energy--of machine and tractor units for the study of motion using Lagrange equations of the second kind},
journal={Actual directions of scientific researches of the XXI century: theory and practice},
publisher={FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov},
year={2015},
pages={202-209},
volume={3},
issue={7},
}