%0 Journal Article %T Mathematical Description for a Particular Case of Ellipse Focus Quasi-Rotation Around an Elliptical Axis %A Antonova, I.V. %A Solomonova, E.V. %A Kadykova, N.. %K ellipse; focus; rotation center; rotation trajectory; parametric equations %J Geometry & Graphics %D 2021 %N 9 %P 6 %I INFRA-M Academic Publishing LLC.