@article{Popov2016choice, author={Popov, G.. and Popova, E..}, title={CHOICE OF OPTIMAL LEVELS OF GRAVITATION IN SOCIAL AND ECONOMIC SYSTEMS BASED ON THE PRINCIPLES OF GRAVITATION}, journal={Vestnik of Astrakhan State Technical University. Series: Management, computer science and informatics}, publisher={Astrakhan State Technical University}, year={2016}, pages={81-89}, volume={2016}, issue={1}, }