@article{Ovechkina2013morphological,
author={Ovechkina, E.. and Shayakhmentova, R..},
title={Morphological changes of scots pines in Nizhenvartovsk region},
journal={Bulletin of Nizhnevartovsk State University},
publisher={Nizhnevartovsk State University},
year={2013},
pages={75-84},
volume={},
issue={3},
}