@article{Perelygina201516099, author={Perelygina, E.. and Razinkova, A..}, title={16099}, 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={218-221}, volume={3}, issue={4}, }