IvanovА. F., KolyadaS. F., MaistrenkoY. L., ParasyukI. O., PelyukhG. P., RomanenkoO. Y., SivakA. G., SamoilenkoV. G., TkachenkoV. I., TrofimchukS. I., FedorenkoV. V., KhusainovD. Y., and ShevchukI. A. “Oleksandr Mykolaiovych Sharkovs’kyi (on His 80th Birthday)”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 69, no. 2, Feb. 2017, pp. 257-60, https://umj.imath.kiev.ua/index.php/umj/article/view/1690.