@article{Voynash2015maintenance,
author={Voynash, A.. and Voynash, S..},
title={Maintenance of the environmental friendliness forest machines},
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={198-202},
volume={3},
issue={2},
}