@article{Ugryumov2014,
author={Ugryumov, S..},
title={},
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={2014},
pages={351-354},
volume={2},
issue={3},
}