@article{Titov2019theoretical,
author={Titov, V.A. and Morozov, O.L.},
title={Theoretical and practical aspects of the implementation of the principles of closed-cycle economics},
journal={The Economy under Guard},
publisher={Nizhny Novgorod Academy of the Ministry of the Interior of Russia},
year={2019},
pages={38-44},
volume={2019},
issue={3},
}