@article{Perfilev2015optimal,
author={Perfilev, P.. and Gumenchuk, A..},
title={Optimal methods raft timber},
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={130-133},
volume={3},
issue={9},
}