Babenko, V. F., A. A. Ligun, and V. P. Motornyi. “On the Results of N. P. Korneichuk Obtained in 1990–1999”. Ukrains’kyi Matematychnyi Zhurnal 52, no. 1 (January 25, 2000): 5–8. Accessed December 5, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/4391.