Parasyuk О. S., and VirchenkoN. O. “Briefly about Scientific Heritage of M. Kravchuk, Member of the Academy of Sciences of Ukraine”. Ukrains’kyi Matematychnyi Zhurnal 44, no. 7 (August 3, 1992): 860-879. Accessed September 1, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/8119.