@article{Isakov2015determining,
author={Isakov, I.. and Mantseva, M..},
title={Determining the size and viability of pollen of local and introduced species of birch trees},
journal={Forestry Engineering Journal},
publisher={FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov},
year={2015},
pages={33-40},
volume={5},
issue={3},
}