@article{Antonova2021mathematical, author={Antonova, I.V. and Solomonova, E.V. and Kadykova, N..}, title={Mathematical Description for a Particular Case of Ellipse Focus Quasi-Rotation Around an Elliptical Axis}, journal={Geometry & Graphics}, publisher={INFRA-M Academic Publishing LLC.}, year={2021}, pages={39-45}, volume={9}, issue={1}, }