@article{2015determine,
author={, .. and Krasnova, V..},
title={Determine the density of  oak wood with the inner sapwood},
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={382-384},
volume={3},
issue={9},
}