To the bright memory of Oleksandr Mykolayovych Sharkovsky. Sixty years of the famous Sharkovsky’s theorem

Ivanov, A. F., Y. L. Maistrenko, and О. Романенко. “To the Bright Memory of Oleksandr Mykolayovych Sharkovsky. Sixty Years of the Famous Sharkovsky’s Theorem”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 76, no. 1, Feb. 2024, pp. 3 - 4, doi:10.3842/umzh.v76i1.8138.