Mitropolskiy, Yu. A., and V. V. Strok. “50 Years of ‘Ukrainskii Matematicheskii Zhurnal’”. Ukrains’kyi Matematychnyi Zhurnal 51, no. 5 (May 25, 1999): 579–580. Accessed December 6, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/4644.