GorbachukM. L., LuchkaA. Y., MitropolskiyYu. A., and SamoilenkoA. M. 1996. “Yurii Dmitrievich Sokolov (on His 100th Birthday)”. Ukrains’kyi Matematychnyi Zhurnal 48 (11), 1443-45. https://umj.imath.kiev.ua/index.php/umj/article/view/5196.