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![Cover for S.Y. Pilyugin · Introduction to Structurally Stable Systems of Differential Equations (Paperback Book) [Softcover Reprint of the Original 1st Ed. 1988 edition] (2012)](https://imusic.b-cdn.net/images/item/original/129/9783034897129.jpg?s-y-pilyugin-2012-introduction-to-structurally-stable-systems-of-differential-equations-paperback-book&class=scaled&v=1412603635)