BerezanskyYu. M., GorbachukV. I., GorbachukM. L., KorolyukV. S., MitropolskiyYu. A., SamoilenkoA. M., and TarasovV. G. “On the 60th Birthday of Leonid Pavlovich Nizhnik”. Ukrains’kyi Matematychnyi Zhurnal 47, no. 10 (October 25, 1995): 1416–1417. Accessed November 24, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/5536.