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

IvanovA. F., MaistrenkoY. L., and РоманенкоО. “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.