@article{Efimov2015quality, author={Efimov, A.. and Zakharova, I..}, title={Quality assessment of round wood by an ultrasonic method}, 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={144-148}, volume={3}, issue={9}, }