@article{Grigoreva2015the,
author={Grigoreva, O.I. and Beliaeva, N.V. and Aroyan, K..},
title={The regeneration of spruce under the canopy of stand  in Leningrad region},
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={123-130},
volume={3},
issue={6},
}