Ivanov, A. F., Yu. L. Maistrenko, and O. Yu. Romanenko. 2024. “Oleksandr Mykolayovych Sharkovs’kyi (07.12.1936 – 21.11.2022)”. Ukrains’kyi Matematychnyi Zhurnal 75 (12): 1587-90. https://doi.org/10.3842/umzh.v75i12.7913.