@article{Balun2020ecological-economically,
author={Balun, O.V.},
title={Ecological-economically balanced functioning of combined drainage systems on heavy soils Novgorod region},
journal={Melioration and Water Management},
publisher={ANO Editorial Board Melioration and water management},
year={2020},
pages={30-33},
volume={2019},
issue={2},
}