BerezanskyYu. M., GorbachukV. I., GorbachukM. L., KostyuchenkoA. G., Kuzhel’S. A., MarchenkoV. O., SamoilenkoA. M., SamoilenkoYu. S., and KhruslovE. Ya. “Leonid Pavlovych Nyzhnyk (on His 70-Th Birthday)”. Ukrains’kyi Matematychnyi Zhurnal 57, no. 8 (August 25, 2005): 1120-1122. Accessed July 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3669.