Ivanov AF, Maistrenko YL, Романенко О. To the bright memory of Oleksandr Mykolayovych Sharkovsky. Sixty years of the famous Sharkovsky’s theorem. Ukr. Mat. Zhurn. [Internet]. 2024Feb.2 [cited 2024Sep.1];76(1):3 -4. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/8138